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Finding the Fourth Proportional to 39,343.50, 54,294.03 and 21,679.50

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Solution

The fourth proportional to 39,343.50, 54,294.03 and 21,679.50 is: 29,917.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,343.50 : 54,294.03 = 21,679.50 : x
  2. Step 2: Convert to fraction form
    39,343.50/54,294.03 = 21,679.50/x
  3. Step 3: Cross multiply
    39,343.50x = 54,294.03 × 21,679.50
  4. Step 4: Simplify right side
    39,343.50x = 1,177,067,423.39
  5. Step 5: Solve for x
    x = 1,177,067,423.39/39,343.50
  6. Step 6: Final answer
    x = 29,917.71

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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.