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Finding the Fourth Proportional to 11,642.76, 17,472.60 and 8,728.92

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Solution

The fourth proportional to 11,642.76, 17,472.60 and 8,728.92 is: 13,099.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,642.76 : 17,472.60 = 8,728.92 : x
  2. Step 2: Convert to fraction form
    11,642.76/17,472.60 = 8,728.92/x
  3. Step 3: Cross multiply
    11,642.76x = 17,472.60 × 8,728.92
  4. Step 4: Simplify right side
    11,642.76x = 152,516,927.59
  5. Step 5: Solve for x
    x = 152,516,927.59/11,642.76
  6. Step 6: Final answer
    x = 13,099.72

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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.