Home / 21,248.25-29,329.89-12,864.75

Finding the Fourth Proportional to 21,248.25, 29,329.89 and 12,864.75

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Solution

The fourth proportional to 21,248.25, 29,329.89 and 12,864.75 is: 17,757.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,248.25 : 29,329.89 = 12,864.75 : x
  2. Step 2: Convert to fraction form
    21,248.25/29,329.89 = 12,864.75/x
  3. Step 3: Cross multiply
    21,248.25x = 29,329.89 × 12,864.75
  4. Step 4: Simplify right side
    21,248.25x = 377,321,702.38
  5. Step 5: Solve for x
    x = 377,321,702.38/21,248.25
  6. Step 6: Final answer
    x = 17,757.78

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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.