Home / 8,690.25-13,002.57-5,387.88

Finding the Fourth Proportional to 8,690.25, 13,002.57 and 5,387.88

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Solution

The fourth proportional to 8,690.25, 13,002.57 and 5,387.88 is: 8,061.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,690.25 : 13,002.57 = 5,387.88 : x
  2. Step 2: Convert to fraction form
    8,690.25/13,002.57 = 5,387.88/x
  3. Step 3: Cross multiply
    8,690.25x = 13,002.57 × 5,387.88
  4. Step 4: Simplify right side
    8,690.25x = 70,056,286.85
  5. Step 5: Solve for x
    x = 70,056,286.85/8,690.25
  6. Step 6: Final answer
    x = 8,061.48

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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.