Home / 39,702.81-54,789.65-21,553.90

Finding the Fourth Proportional to 39,702.81, 54,789.65 and 21,553.90

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Solution

The fourth proportional to 39,702.81, 54,789.65 and 21,553.90 is: 29,744.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,702.81 : 54,789.65 = 21,553.90 : x
  2. Step 2: Convert to fraction form
    39,702.81/54,789.65 = 21,553.90/x
  3. Step 3: Cross multiply
    39,702.81x = 54,789.65 × 21,553.90
  4. Step 4: Simplify right side
    39,702.81x = 1,180,930,473.22
  5. Step 5: Solve for x
    x = 1,180,930,473.22/39,702.81
  6. Step 6: Final answer
    x = 29,744.26

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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.