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Finding the Fourth Proportional to 39,229.50, 54,136.90 and 21,324.50

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Solution

The fourth proportional to 39,229.50, 54,136.90 and 21,324.50 is: 29,427.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,229.50 : 54,136.90 = 21,324.50 : x
  2. Step 2: Convert to fraction form
    39,229.50/54,136.90 = 21,324.50/x
  3. Step 3: Cross multiply
    39,229.50x = 54,136.90 × 21,324.50
  4. Step 4: Simplify right side
    39,229.50x = 1,154,442,324.05
  5. Step 5: Solve for x
    x = 1,154,442,324.05/39,229.50
  6. Step 6: Final answer
    x = 29,427.91

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Double scale
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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.