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Finding the Fourth Proportional to 38,429.80, 57,652.80 and 11,773.60

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Solution

The fourth proportional to 38,429.80, 57,652.80 and 11,773.60 is: 17,662.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,429.80 : 57,652.80 = 11,773.60 : x
  2. Step 2: Convert to fraction form
    38,429.80/57,652.80 = 11,773.60/x
  3. Step 3: Cross multiply
    38,429.80x = 57,652.80 × 11,773.60
  4. Step 4: Simplify right side
    38,429.80x = 678,781,006.08
  5. Step 5: Solve for x
    x = 678,781,006.08/38,429.80
  6. Step 6: Final answer
    x = 17,662.88

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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.