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Finding the Fourth Proportional to 18,686.76, 27,974.17 and 18,022.15

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Solution

The fourth proportional to 18,686.76, 27,974.17 and 18,022.15 is: 26,979.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,686.76 : 27,974.17 = 18,022.15 : x
  2. Step 2: Convert to fraction form
    18,686.76/27,974.17 = 18,022.15/x
  3. Step 3: Cross multiply
    18,686.76x = 27,974.17 × 18,022.15
  4. Step 4: Simplify right side
    18,686.76x = 504,154,687.87
  5. Step 5: Solve for x
    x = 504,154,687.87/18,686.76
  6. Step 6: Final answer
    x = 26,979.25

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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.