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Finding the Fourth Proportional to 12,508.80, 18,751.68 and 5,938.08

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Solution

The fourth proportional to 12,508.80, 18,751.68 and 5,938.08 is: 8,901.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,508.80 : 18,751.68 = 5,938.08 : x
  2. Step 2: Convert to fraction form
    12,508.80/18,751.68 = 5,938.08/x
  3. Step 3: Cross multiply
    12,508.80x = 18,751.68 × 5,938.08
  4. Step 4: Simplify right side
    12,508.80x = 111,348,975.97
  5. Step 5: Solve for x
    x = 111,348,975.97/12,508.80
  6. Step 6: Final answer
    x = 8,901.65

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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.