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Finding the Fourth Proportional to 21,486.60, 32,229.90 and 6,696.71

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Solution

The fourth proportional to 21,486.60, 32,229.90 and 6,696.71 is: 10,045.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,486.60 : 32,229.90 = 6,696.71 : x
  2. Step 2: Convert to fraction form
    21,486.60/32,229.90 = 6,696.71/x
  3. Step 3: Cross multiply
    21,486.60x = 32,229.90 × 6,696.71
  4. Step 4: Simplify right side
    21,486.60x = 215,834,132.48
  5. Step 5: Solve for x
    x = 215,834,132.48/21,486.60
  6. Step 6: Final answer
    x = 10,045.06

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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.