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Finding the Fourth Proportional to 18,882, 26,039.28 and 13,772.88

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Solution

The fourth proportional to 18,882, 26,039.28 and 13,772.88 is: 18,993.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,882 : 26,039.28 = 13,772.88 : x
  2. Step 2: Convert to fraction form
    18,882/26,039.28 = 13,772.88/x
  3. Step 3: Cross multiply
    18,882x = 26,039.28 × 13,772.88
  4. Step 4: Simplify right side
    18,882x = 358,635,878.73
  5. Step 5: Solve for x
    x = 358,635,878.73/18,882
  6. Step 6: Final answer
    x = 18,993.53

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.