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Finding the Fourth Proportional to 28,502.71, 42,754.68 and 8,781.23

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Solution

The fourth proportional to 28,502.71, 42,754.68 and 8,781.23 is: 13,172.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,502.71 : 42,754.68 = 8,781.23 : x
  2. Step 2: Convert to fraction form
    28,502.71/42,754.68 = 8,781.23/x
  3. Step 3: Cross multiply
    28,502.71x = 42,754.68 × 8,781.23
  4. Step 4: Simplify right side
    28,502.71x = 375,438,785.54
  5. Step 5: Solve for x
    x = 375,438,785.54/28,502.71
  6. Step 6: Final answer
    x = 13,172.04

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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.