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Finding the Fourth Proportional to 39,565.74, 54,602.01 and 21,660.74

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Solution

The fourth proportional to 39,565.74, 54,602.01 and 21,660.74 is: 29,892.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,565.74 : 54,602.01 = 21,660.74 : x
  2. Step 2: Convert to fraction form
    39,565.74/54,602.01 = 21,660.74/x
  3. Step 3: Cross multiply
    39,565.74x = 54,602.01 × 21,660.74
  4. Step 4: Simplify right side
    39,565.74x = 1,182,719,942.09
  5. Step 5: Solve for x
    x = 1,182,719,942.09/39,565.74
  6. Step 6: Final answer
    x = 29,892.53

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.