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Finding the Fourth Proportional to 15,132.71, 20,882.55 and 8,418.11

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Solution

The fourth proportional to 15,132.71, 20,882.55 and 8,418.11 is: 11,616.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,132.71 : 20,882.55 = 8,418.11 : x
  2. Step 2: Convert to fraction form
    15,132.71/20,882.55 = 8,418.11/x
  3. Step 3: Cross multiply
    15,132.71x = 20,882.55 × 8,418.11
  4. Step 4: Simplify right side
    15,132.71x = 175,791,498.57
  5. Step 5: Solve for x
    x = 175,791,498.57/15,132.71
  6. Step 6: Final answer
    x = 11,616.66

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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.