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Finding the Fourth Proportional to 54,961.80, 82,456.20 and 15,518.40

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Solution

The fourth proportional to 54,961.80, 82,456.20 and 15,518.40 is: 23,281.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,961.80 : 82,456.20 = 15,518.40 : x
  2. Step 2: Convert to fraction form
    54,961.80/82,456.20 = 15,518.40/x
  3. Step 3: Cross multiply
    54,961.80x = 82,456.20 × 15,518.40
  4. Step 4: Simplify right side
    54,961.80x = 1,279,588,294.08
  5. Step 5: Solve for x
    x = 1,279,588,294.08/54,961.80
  6. Step 6: Final answer
    x = 23,281.41

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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.