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Finding the Fourth Proportional to 13,422.10, 18,522.98 and 7,453.87

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Solution

The fourth proportional to 13,422.10, 18,522.98 and 7,453.87 is: 10,286.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,422.10 : 18,522.98 = 7,453.87 : x
  2. Step 2: Convert to fraction form
    13,422.10/18,522.98 = 7,453.87/x
  3. Step 3: Cross multiply
    13,422.10x = 18,522.98 × 7,453.87
  4. Step 4: Simplify right side
    13,422.10x = 138,067,884.93
  5. Step 5: Solve for x
    x = 138,067,884.93/13,422.10
  6. Step 6: Final answer
    x = 10,286.61

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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.