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Finding the Fourth Proportional to 38,655.43, 57,990.06 and 19,930.43

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Solution

The fourth proportional to 38,655.43, 57,990.06 and 19,930.43 is: 29,899.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,655.43 : 57,990.06 = 19,930.43 : x
  2. Step 2: Convert to fraction form
    38,655.43/57,990.06 = 19,930.43/x
  3. Step 3: Cross multiply
    38,655.43x = 57,990.06 × 19,930.43
  4. Step 4: Simplify right side
    38,655.43x = 1,155,766,976.50
  5. Step 5: Solve for x
    x = 1,155,766,976.50/38,655.43
  6. Step 6: Final answer
    x = 29,899.22

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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.