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Finding the Fourth Proportional to 21,922.80, 32,892.30 and 7,132.20

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Solution

The fourth proportional to 21,922.80, 32,892.30 and 7,132.20 is: 10,700.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,922.80 : 32,892.30 = 7,132.20 : x
  2. Step 2: Convert to fraction form
    21,922.80/32,892.30 = 7,132.20/x
  3. Step 3: Cross multiply
    21,922.80x = 32,892.30 × 7,132.20
  4. Step 4: Simplify right side
    21,922.80x = 234,594,462.06
  5. Step 5: Solve for x
    x = 234,594,462.06/21,922.80
  6. Step 6: Final answer
    x = 10,700.94

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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.