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Finding the Fourth Proportional to 21,998.60, 32,997.90 and 15,000.20

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Solution

The fourth proportional to 21,998.60, 32,997.90 and 15,000.20 is: 22,500.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,998.60 : 32,997.90 = 15,000.20 : x
  2. Step 2: Convert to fraction form
    21,998.60/32,997.90 = 15,000.20/x
  3. Step 3: Cross multiply
    21,998.60x = 32,997.90 × 15,000.20
  4. Step 4: Simplify right side
    21,998.60x = 494,975,099.58
  5. Step 5: Solve for x
    x = 494,975,099.58/21,998.60
  6. Step 6: Final answer
    x = 22,500.30

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Double scale
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Similar ratio
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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.