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Finding the Fourth Proportional to 39,493.50, 54,499.50 and 21,589.20

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Solution

The fourth proportional to 39,493.50, 54,499.50 and 21,589.20 is: 29,792.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,493.50 : 54,499.50 = 21,589.20 : x
  2. Step 2: Convert to fraction form
    39,493.50/54,499.50 = 21,589.20/x
  3. Step 3: Cross multiply
    39,493.50x = 54,499.50 × 21,589.20
  4. Step 4: Simplify right side
    39,493.50x = 1,176,600,605.40
  5. Step 5: Solve for x
    x = 1,176,600,605.40/39,493.50
  6. Step 6: Final answer
    x = 29,792.26

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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.