Home / 20,140.32-30,207.36-10,286.88

Finding the Fourth Proportional to 20,140.32, 30,207.36 and 10,286.88

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Solution

The fourth proportional to 20,140.32, 30,207.36 and 10,286.88 is: 15,428.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,140.32 : 30,207.36 = 10,286.88 : x
  2. Step 2: Convert to fraction form
    20,140.32/30,207.36 = 10,286.88/x
  3. Step 3: Cross multiply
    20,140.32x = 30,207.36 × 10,286.88
  4. Step 4: Simplify right side
    20,140.32x = 310,739,487.44
  5. Step 5: Solve for x
    x = 310,739,487.44/20,140.32
  6. Step 6: Final answer
    x = 15,428.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.