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Finding the Fourth Proportional to 19,873.82, 29,787.69 and 18,721.82

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Solution

The fourth proportional to 19,873.82, 29,787.69 and 18,721.82 is: 28,061.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,873.82 : 29,787.69 = 18,721.82 : x
  2. Step 2: Convert to fraction form
    19,873.82/29,787.69 = 18,721.82/x
  3. Step 3: Cross multiply
    19,873.82x = 29,787.69 × 18,721.82
  4. Step 4: Simplify right side
    19,873.82x = 557,679,770.40
  5. Step 5: Solve for x
    x = 557,679,770.40/19,873.82
  6. Step 6: Final answer
    x = 28,061.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.