Home / 15,591.28-21,517.72-8,693.12

Finding the Fourth Proportional to 15,591.28, 21,517.72 and 8,693.12

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Solution

The fourth proportional to 15,591.28, 21,517.72 and 8,693.12 is: 11,997.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,591.28 : 21,517.72 = 8,693.12 : x
  2. Step 2: Convert to fraction form
    15,591.28/21,517.72 = 8,693.12/x
  3. Step 3: Cross multiply
    15,591.28x = 21,517.72 × 8,693.12
  4. Step 4: Simplify right side
    15,591.28x = 187,056,122.09
  5. Step 5: Solve for x
    x = 187,056,122.09/15,591.28
  6. Step 6: Final answer
    x = 11,997.48

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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.