Home / 8,689.28-13,034.08-2,115.52

Finding the Fourth Proportional to 8,689.28, 13,034.08 and 2,115.52

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Solution

The fourth proportional to 8,689.28, 13,034.08 and 2,115.52 is: 3,173.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,689.28 : 13,034.08 = 2,115.52 : x
  2. Step 2: Convert to fraction form
    8,689.28/13,034.08 = 2,115.52/x
  3. Step 3: Cross multiply
    8,689.28x = 13,034.08 × 2,115.52
  4. Step 4: Simplify right side
    8,689.28x = 27,573,856.92
  5. Step 5: Solve for x
    x = 27,573,856.92/8,689.28
  6. Step 6: Final answer
    x = 3,173.32

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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.