Home / 8,577.28-12,864-5,115.52

Finding the Fourth Proportional to 8,577.28, 12,864 and 5,115.52

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Solution

The fourth proportional to 8,577.28, 12,864 and 5,115.52 is: 7,672.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,577.28 : 12,864 = 5,115.52 : x
  2. Step 2: Convert to fraction form
    8,577.28/12,864 = 5,115.52/x
  3. Step 3: Cross multiply
    8,577.28x = 12,864 × 5,115.52
  4. Step 4: Simplify right side
    8,577.28x = 65,806,049.28
  5. Step 5: Solve for x
    x = 65,806,049.28/8,577.28
  6. Step 6: Final answer
    x = 7,672.13

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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.