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Finding the Fourth Proportional to 11,516.56, 15,872.16 and 8,367.28

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Solution

The fourth proportional to 11,516.56, 15,872.16 and 8,367.28 is: 11,531.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,516.56 : 15,872.16 = 8,367.28 : x
  2. Step 2: Convert to fraction form
    11,516.56/15,872.16 = 8,367.28/x
  3. Step 3: Cross multiply
    11,516.56x = 15,872.16 × 8,367.28
  4. Step 4: Simplify right side
    11,516.56x = 132,806,806.92
  5. Step 5: Solve for x
    x = 132,806,806.92/11,516.56
  6. Step 6: Final answer
    x = 11,531.81

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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.