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Finding the Fourth Proportional to 18,610.31, 27,781.49 and 15,949.13

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Solution

The fourth proportional to 18,610.31, 27,781.49 and 15,949.13 is: 23,808.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,610.31 : 27,781.49 = 15,949.13 : x
  2. Step 2: Convert to fraction form
    18,610.31/27,781.49 = 15,949.13/x
  3. Step 3: Cross multiply
    18,610.31x = 27,781.49 × 15,949.13
  4. Step 4: Simplify right side
    18,610.31x = 443,090,496.57
  5. Step 5: Solve for x
    x = 443,090,496.57/18,610.31
  6. Step 6: Final answer
    x = 23,808.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.