Home / 10,115.28-13,957.24-5,638.92

Finding the Fourth Proportional to 10,115.28, 13,957.24 and 5,638.92

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Solution

The fourth proportional to 10,115.28, 13,957.24 and 5,638.92 is: 7,780.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,115.28 : 13,957.24 = 5,638.92 : x
  2. Step 2: Convert to fraction form
    10,115.28/13,957.24 = 5,638.92/x
  3. Step 3: Cross multiply
    10,115.28x = 13,957.24 × 5,638.92
  4. Step 4: Simplify right side
    10,115.28x = 78,703,759.78
  5. Step 5: Solve for x
    x = 78,703,759.78/10,115.28
  6. Step 6: Final answer
    x = 7,780.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.