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Finding the Fourth Proportional to 8,653.54, 12,981.38 and 3,387.87

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Solution

The fourth proportional to 8,653.54, 12,981.38 and 3,387.87 is: 5,082.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,653.54 : 12,981.38 = 3,387.87 : x
  2. Step 2: Convert to fraction form
    8,653.54/12,981.38 = 3,387.87/x
  3. Step 3: Cross multiply
    8,653.54x = 12,981.38 × 3,387.87
  4. Step 4: Simplify right side
    8,653.54x = 43,979,227.86
  5. Step 5: Solve for x
    x = 43,979,227.86/8,653.54
  6. Step 6: Final answer
    x = 5,082.22

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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.