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Finding the Fourth Proportional to 28,781.28, 43,176.18 and 9,053.28

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Solution

The fourth proportional to 28,781.28, 43,176.18 and 9,053.28 is: 13,581.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,781.28 : 43,176.18 = 9,053.28 : x
  2. Step 2: Convert to fraction form
    28,781.28/43,176.18 = 9,053.28/x
  3. Step 3: Cross multiply
    28,781.28x = 43,176.18 × 9,053.28
  4. Step 4: Simplify right side
    28,781.28x = 390,886,046.87
  5. Step 5: Solve for x
    x = 390,886,046.87/28,781.28
  6. Step 6: Final answer
    x = 13,581.26

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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.