Home / 13,930.57-20,901.19-8,387.88

Finding the Fourth Proportional to 13,930.57, 20,901.19 and 8,387.88

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Solution

The fourth proportional to 13,930.57, 20,901.19 and 8,387.88 is: 12,585.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,930.57 : 20,901.19 = 8,387.88 : x
  2. Step 2: Convert to fraction form
    13,930.57/20,901.19 = 8,387.88/x
  3. Step 3: Cross multiply
    13,930.57x = 20,901.19 × 8,387.88
  4. Step 4: Simplify right side
    13,930.57x = 175,316,569.07
  5. Step 5: Solve for x
    x = 175,316,569.07/13,930.57
  6. Step 6: Final answer
    x = 12,585.02

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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.