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Finding the Fourth Proportional to 39,596.47, 54,644.49 and 21,691.47

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Solution

The fourth proportional to 39,596.47, 54,644.49 and 21,691.47 is: 29,934.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,596.47 : 54,644.49 = 21,691.47 : x
  2. Step 2: Convert to fraction form
    39,596.47/54,644.49 = 21,691.47/x
  3. Step 3: Cross multiply
    39,596.47x = 54,644.49 × 21,691.47
  4. Step 4: Simplify right side
    39,596.47x = 1,185,319,165.85
  5. Step 5: Solve for x
    x = 1,185,319,165.85/39,596.47
  6. Step 6: Final answer
    x = 29,934.97

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1.5x scale

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.