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Finding the Fourth Proportional to 40,728.60, 61,064.10 and 18,552.60

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Solution

The fourth proportional to 40,728.60, 61,064.10 and 18,552.60 is: 27,815.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,728.60 : 61,064.10 = 18,552.60 : x
  2. Step 2: Convert to fraction form
    40,728.60/61,064.10 = 18,552.60/x
  3. Step 3: Cross multiply
    40,728.60x = 61,064.10 × 18,552.60
  4. Step 4: Simplify right side
    40,728.60x = 1,132,897,821.66
  5. Step 5: Solve for x
    x = 1,132,897,821.66/40,728.60
  6. Step 6: Final answer
    x = 27,815.78

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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.