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Finding the Fourth Proportional to 18,721.18, 25,839.66 and 10,768

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Solution

The fourth proportional to 18,721.18, 25,839.66 and 10,768 is: 14,862.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,721.18 : 25,839.66 = 10,768 : x
  2. Step 2: Convert to fraction form
    18,721.18/25,839.66 = 10,768/x
  3. Step 3: Cross multiply
    18,721.18x = 25,839.66 × 10,768
  4. Step 4: Simplify right side
    18,721.18x = 278,241,458.88
  5. Step 5: Solve for x
    x = 278,241,458.88/18,721.18
  6. Step 6: Final answer
    x = 14,862.39

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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.