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Finding the Fourth Proportional to 39,691.63, 59,538.81 and 19,959.43

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Solution

The fourth proportional to 39,691.63, 59,538.81 and 19,959.43 is: 29,939.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,691.63 : 59,538.81 = 19,959.43 : x
  2. Step 2: Convert to fraction form
    39,691.63/59,538.81 = 19,959.43/x
  3. Step 3: Cross multiply
    39,691.63x = 59,538.81 × 19,959.43
  4. Step 4: Simplify right side
    39,691.63x = 1,188,360,710.48
  5. Step 5: Solve for x
    x = 1,188,360,710.48/39,691.63
  6. Step 6: Final answer
    x = 29,939.83

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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.