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Finding the Fourth Proportional to 21,989.80, 32,922.30 and 17,068.20

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Solution

The fourth proportional to 21,989.80, 32,922.30 and 17,068.20 is: 25,553.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,989.80 : 32,922.30 = 17,068.20 : x
  2. Step 2: Convert to fraction form
    21,989.80/32,922.30 = 17,068.20/x
  3. Step 3: Cross multiply
    21,989.80x = 32,922.30 × 17,068.20
  4. Step 4: Simplify right side
    21,989.80x = 561,924,400.86
  5. Step 5: Solve for x
    x = 561,924,400.86/21,989.80
  6. Step 6: Final answer
    x = 25,553.87

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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.