Home / 15,454.38-21,327.17-8,380.80

Finding the Fourth Proportional to 15,454.38, 21,327.17 and 8,380.80

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Solution

The fourth proportional to 15,454.38, 21,327.17 and 8,380.80 is: 11,565.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,454.38 : 21,327.17 = 8,380.80 : x
  2. Step 2: Convert to fraction form
    15,454.38/21,327.17 = 8,380.80/x
  3. Step 3: Cross multiply
    15,454.38x = 21,327.17 × 8,380.80
  4. Step 4: Simplify right side
    15,454.38x = 178,738,639.70
  5. Step 5: Solve for x
    x = 178,738,639.70/15,454.38
  6. Step 6: Final answer
    x = 11,565.57

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Half scale
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Double scale
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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.