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Finding the Fourth Proportional to 21,398.31, 32,102.73 and 8,251.61

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Solution

The fourth proportional to 21,398.31, 32,102.73 and 8,251.61 is: 12,379.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,398.31 : 32,102.73 = 8,251.61 : x
  2. Step 2: Convert to fraction form
    21,398.31/32,102.73 = 8,251.61/x
  3. Step 3: Cross multiply
    21,398.31x = 32,102.73 × 8,251.61
  4. Step 4: Simplify right side
    21,398.31x = 264,899,047.38
  5. Step 5: Solve for x
    x = 264,899,047.38/21,398.31
  6. Step 6: Final answer
    x = 12,379.44

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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.