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Finding the Fourth Proportional to 39,221.80, 58,865.10 and 18,194.20

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Solution

The fourth proportional to 39,221.80, 58,865.10 and 18,194.20 is: 27,306.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,221.80 : 58,865.10 = 18,194.20 : x
  2. Step 2: Convert to fraction form
    39,221.80/58,865.10 = 18,194.20/x
  3. Step 3: Cross multiply
    39,221.80x = 58,865.10 × 18,194.20
  4. Step 4: Simplify right side
    39,221.80x = 1,071,003,402.42
  5. Step 5: Solve for x
    x = 1,071,003,402.42/39,221.80
  6. Step 6: Final answer
    x = 27,306.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.