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Finding the Fourth Proportional to 21,815.31, 32,722.97 and 5,399.31

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Solution

The fourth proportional to 21,815.31, 32,722.97 and 5,399.31 is: 8,098.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,815.31 : 32,722.97 = 5,399.31 : x
  2. Step 2: Convert to fraction form
    21,815.31/32,722.97 = 5,399.31/x
  3. Step 3: Cross multiply
    21,815.31x = 32,722.97 × 5,399.31
  4. Step 4: Simplify right side
    21,815.31x = 176,681,432.15
  5. Step 5: Solve for x
    x = 176,681,432.15/21,815.31
  6. Step 6: Final answer
    x = 8,098.97

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1.5x scale

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.