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Finding the Fourth Proportional to 13,422.87, 18,523.28 and 7,454.43

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Solution

The fourth proportional to 13,422.87, 18,523.28 and 7,454.43 is: 10,286.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,422.87 : 18,523.28 = 7,454.43 : x
  2. Step 2: Convert to fraction form
    13,422.87/18,523.28 = 7,454.43/x
  3. Step 3: Cross multiply
    13,422.87x = 18,523.28 × 7,454.43
  4. Step 4: Simplify right side
    13,422.87x = 138,080,456.86
  5. Step 5: Solve for x
    x = 138,080,456.86/13,422.87
  6. Step 6: Final answer
    x = 10,286.95

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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.