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Finding the Fourth Proportional to 18,721, 25,835.16 and 10,338.04

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Solution

The fourth proportional to 18,721, 25,835.16 and 10,338.04 is: 14,266.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,721 : 25,835.16 = 10,338.04 : x
  2. Step 2: Convert to fraction form
    18,721/25,835.16 = 10,338.04/x
  3. Step 3: Cross multiply
    18,721x = 25,835.16 × 10,338.04
  4. Step 4: Simplify right side
    18,721x = 267,084,917.49
  5. Step 5: Solve for x
    x = 267,084,917.49/18,721
  6. Step 6: Final answer
    x = 14,266.59

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