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Finding the Fourth Proportional to 22,087.76, 30,449.84 and 15,789.20

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Solution

The fourth proportional to 22,087.76, 30,449.84 and 15,789.20 is: 21,766.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,087.76 : 30,449.84 = 15,789.20 : x
  2. Step 2: Convert to fraction form
    22,087.76/30,449.84 = 15,789.20/x
  3. Step 3: Cross multiply
    22,087.76x = 30,449.84 × 15,789.20
  4. Step 4: Simplify right side
    22,087.76x = 480,778,613.73
  5. Step 5: Solve for x
    x = 480,778,613.73/22,087.76
  6. Step 6: Final answer
    x = 21,766.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.