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Finding the Fourth Proportional to 21,489.79, 32,234.70 and 6,699.90

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Solution

The fourth proportional to 21,489.79, 32,234.70 and 6,699.90 is: 10,049.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,489.79 : 32,234.70 = 6,699.90 : x
  2. Step 2: Convert to fraction form
    21,489.79/32,234.70 = 6,699.90/x
  3. Step 3: Cross multiply
    21,489.79x = 32,234.70 × 6,699.90
  4. Step 4: Simplify right side
    21,489.79x = 215,969,233.03
  5. Step 5: Solve for x
    x = 215,969,233.03/21,489.79
  6. Step 6: Final answer
    x = 10,049.85

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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.