📐 Proportion Calculator
Solve proportion problems online quickly.
📊 Formula: A / B = C / X
Find the unknown X value by entering A, B, and C values.
📐 What is Proportion?
Proportion is the equality of two ratios. With our online proportion calculator tool, you can easily find the unknown X value in the A/B = C/X formula.
Proportion Formula
Basic Formula:
A / B = C / X
Solution Formula:
X = (B × C) ÷ A
Example:
- 3 / 5 = 6 / X
- X = (5 × 6) ÷ 3 = 30 ÷ 3 = 10
- Verification: 3/5 = 0.6 and 6/10 = 0.6 ✓
Use Cases
🎓 Math
- Proportion problems
- Direct proportion
- Inverse proportion
- Math homework
🏪 Commerce
- Price calculations
- Discount rates
- Profit-loss calculation
- Unit price comparison
🍳 Cooking
- Recipe ratios
- Ingredient calculation
- Portion adjustment
- Mixture ratios
🏗️ Engineering
- Scale calculations
- Material ratios
- Project scaling
- Technical drawings
Proportion Types
1. Direct Proportion:
As one quantity increases, the other increases at the same rate.
Example: As speed increases, distance covered increases.
2. Inverse Proportion:
As one quantity increases, the other decreases at the same rate.
Example: As the number of workers increases, time to finish work decreases.
Practical Examples
Example Problems:
- Shopping: If 3 kg apples are 15 TL, how much is 5 kg?
- Speed: If 120 km is traveled in 2 hours, how many km in 3 hours?
- Recipe: If 2 cups of flour are needed for 4 people, how many for 6?
Advantages
- ✅ Fast problem solving
- ✅ Check with verification
- ✅ Step-by-step explanation
- ✅ Precise calculation
- ✅ Free use
💡 Tip: Pay attention to having the same units in proportion problems. If there are different units, convert them first.