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Finding the Fourth Proportional to 18,117.10, 27,175.65 and 10,243.90

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Solution

The fourth proportional to 18,117.10, 27,175.65 and 10,243.90 is: 15,365.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,117.10 : 27,175.65 = 10,243.90 : x
  2. Step 2: Convert to fraction form
    18,117.10/27,175.65 = 10,243.90/x
  3. Step 3: Cross multiply
    18,117.10x = 27,175.65 × 10,243.90
  4. Step 4: Simplify right side
    18,117.10x = 278,384,641.04
  5. Step 5: Solve for x
    x = 278,384,641.04/18,117.10
  6. Step 6: Final answer
    x = 15,365.85

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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.