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Finding the Fourth Proportional to 15,892.98, 21,932.33 and 8,819.40

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Solution

The fourth proportional to 15,892.98, 21,932.33 and 8,819.40 is: 12,170.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,892.98 : 21,932.33 = 8,819.40 : x
  2. Step 2: Convert to fraction form
    15,892.98/21,932.33 = 8,819.40/x
  3. Step 3: Cross multiply
    15,892.98x = 21,932.33 × 8,819.40
  4. Step 4: Simplify right side
    15,892.98x = 193,429,991.20
  5. Step 5: Solve for x
    x = 193,429,991.20/15,892.98
  6. Step 6: Final answer
    x = 12,170.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.