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Finding the Fourth Proportional to 13,959.47, 20,939.97 and 4,599.11

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Solution

The fourth proportional to 13,959.47, 20,939.97 and 4,599.11 is: 6,898.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,959.47 : 20,939.97 = 4,599.11 : x
  2. Step 2: Convert to fraction form
    13,959.47/20,939.97 = 4,599.11/x
  3. Step 3: Cross multiply
    13,959.47x = 20,939.97 × 4,599.11
  4. Step 4: Simplify right side
    13,959.47x = 96,305,269.15
  5. Step 5: Solve for x
    x = 96,305,269.15/13,959.47
  6. Step 6: Final answer
    x = 6,898.92

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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.