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Finding the Fourth Proportional to 28,615.60, 42,801.90 and 25,675.30

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Solution

The fourth proportional to 28,615.60, 42,801.90 and 25,675.30 is: 38,403.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,615.60 : 42,801.90 = 25,675.30 : x
  2. Step 2: Convert to fraction form
    28,615.60/42,801.90 = 25,675.30/x
  3. Step 3: Cross multiply
    28,615.60x = 42,801.90 × 25,675.30
  4. Step 4: Simplify right side
    28,615.60x = 1,098,951,623.07
  5. Step 5: Solve for x
    x = 1,098,951,623.07/28,615.60
  6. Step 6: Final answer
    x = 38,403.93

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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.