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Finding the Fourth Proportional to 18,139.71, 26,990.09 and 17,687.73

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Solution

The fourth proportional to 18,139.71, 26,990.09 and 17,687.73 is: 26,317.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,139.71 : 26,990.09 = 17,687.73 : x
  2. Step 2: Convert to fraction form
    18,139.71/26,990.09 = 17,687.73/x
  3. Step 3: Cross multiply
    18,139.71x = 26,990.09 × 17,687.73
  4. Step 4: Simplify right side
    18,139.71x = 477,393,603.19
  5. Step 5: Solve for x
    x = 477,393,603.19/18,139.71
  6. Step 6: Final answer
    x = 26,317.59

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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.