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Finding the Fourth Proportional to 10,612.88, 15,921.56 and 3,687.92

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Solution

The fourth proportional to 10,612.88, 15,921.56 and 3,687.92 is: 5,532.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,612.88 : 15,921.56 = 3,687.92 : x
  2. Step 2: Convert to fraction form
    10,612.88/15,921.56 = 3,687.92/x
  3. Step 3: Cross multiply
    10,612.88x = 15,921.56 × 3,687.92
  4. Step 4: Simplify right side
    10,612.88x = 58,717,439.56
  5. Step 5: Solve for x
    x = 58,717,439.56/10,612.88
  6. Step 6: Final answer
    x = 5,532.66

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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.