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Finding the Fourth Proportional to 15,454.56, 21,327.30 and 8,381

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Solution

The fourth proportional to 15,454.56, 21,327.30 and 8,381 is: 11,565.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,454.56 : 21,327.30 = 8,381 : x
  2. Step 2: Convert to fraction form
    15,454.56/21,327.30 = 8,381/x
  3. Step 3: Cross multiply
    15,454.56x = 21,327.30 × 8,381
  4. Step 4: Simplify right side
    15,454.56x = 178,744,101.30
  5. Step 5: Solve for x
    x = 178,744,101.30/15,454.56
  6. Step 6: Final answer
    x = 11,565.78

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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.