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Finding the Fourth Proportional to 21,691.80, 32,516.10 and 9,984.60

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Solution

The fourth proportional to 21,691.80, 32,516.10 and 9,984.60 is: 14,966.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,691.80 : 32,516.10 = 9,984.60 : x
  2. Step 2: Convert to fraction form
    21,691.80/32,516.10 = 9,984.60/x
  3. Step 3: Cross multiply
    21,691.80x = 32,516.10 × 9,984.60
  4. Step 4: Simplify right side
    21,691.80x = 324,660,252.06
  5. Step 5: Solve for x
    x = 324,660,252.06/21,691.80
  6. Step 6: Final answer
    x = 14,966.96

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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.