Home / 10,355.28-15,531-3,428.88

Finding the Fourth Proportional to 10,355.28, 15,531 and 3,428.88

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Solution

The fourth proportional to 10,355.28, 15,531 and 3,428.88 is: 5,142.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,355.28 : 15,531 = 3,428.88 : x
  2. Step 2: Convert to fraction form
    10,355.28/15,531 = 3,428.88/x
  3. Step 3: Cross multiply
    10,355.28x = 15,531 × 3,428.88
  4. Step 4: Simplify right side
    10,355.28x = 53,253,935.28
  5. Step 5: Solve for x
    x = 53,253,935.28/10,355.28
  6. Step 6: Final answer
    x = 5,142.68

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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.