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Finding the Fourth Proportional to 18,371.09, 27,431.87 and 17,872.87

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Solution

The fourth proportional to 18,371.09, 27,431.87 and 17,872.87 is: 26,687.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,371.09 : 27,431.87 = 17,872.87 : x
  2. Step 2: Convert to fraction form
    18,371.09/27,431.87 = 17,872.87/x
  3. Step 3: Cross multiply
    18,371.09x = 27,431.87 × 17,872.87
  4. Step 4: Simplify right side
    18,371.09x = 490,286,222.47
  5. Step 5: Solve for x
    x = 490,286,222.47/18,371.09
  6. Step 6: Final answer
    x = 26,687.92

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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.