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Finding the Fourth Proportional to 28,572.59, 42,815.82 and 25,458.16

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Solution

The fourth proportional to 28,572.59, 42,815.82 and 25,458.16 is: 38,148.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,572.59 : 42,815.82 = 25,458.16 : x
  2. Step 2: Convert to fraction form
    28,572.59/42,815.82 = 25,458.16/x
  3. Step 3: Cross multiply
    28,572.59x = 42,815.82 × 25,458.16
  4. Step 4: Simplify right side
    28,572.59x = 1,090,012,071.31
  5. Step 5: Solve for x
    x = 1,090,012,071.31/28,572.59
  6. Step 6: Final answer
    x = 38,148.88

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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.