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Finding the Fourth Proportional to 63,620.80, 95,406.88 and 20,916.28

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Solution

The fourth proportional to 63,620.80, 95,406.88 and 20,916.28 is: 31,366.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,620.80 : 95,406.88 = 20,916.28 : x
  2. Step 2: Convert to fraction form
    63,620.80/95,406.88 = 20,916.28/x
  3. Step 3: Cross multiply
    63,620.80x = 95,406.88 × 20,916.28
  4. Step 4: Simplify right side
    63,620.80x = 1,995,557,016.01
  5. Step 5: Solve for x
    x = 1,995,557,016.01/63,620.80
  6. Step 6: Final answer
    x = 31,366.42

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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.