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Finding the Fourth Proportional to 39,402.80, 54,379.12 and 22,412.40

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Solution

The fourth proportional to 39,402.80, 54,379.12 and 22,412.40 is: 30,930.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,402.80 : 54,379.12 = 22,412.40 : x
  2. Step 2: Convert to fraction form
    39,402.80/54,379.12 = 22,412.40/x
  3. Step 3: Cross multiply
    39,402.80x = 54,379.12 × 22,412.40
  4. Step 4: Simplify right side
    39,402.80x = 1,218,766,589.09
  5. Step 5: Solve for x
    x = 1,218,766,589.09/39,402.80
  6. Step 6: Final answer
    x = 30,930.96

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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.