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Finding the Fourth Proportional to 8,081.88, 12,122.88 and 5,162.28

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Solution

The fourth proportional to 8,081.88, 12,122.88 and 5,162.28 is: 7,743.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,081.88 : 12,122.88 = 5,162.28 : x
  2. Step 2: Convert to fraction form
    8,081.88/12,122.88 = 5,162.28/x
  3. Step 3: Cross multiply
    8,081.88x = 12,122.88 × 5,162.28
  4. Step 4: Simplify right side
    8,081.88x = 62,581,700.97
  5. Step 5: Solve for x
    x = 62,581,700.97/8,081.88
  6. Step 6: Final answer
    x = 7,743.46

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1.5x scale

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.