Home / 21,671.26-29,902.70-13,171.92

Finding the Fourth Proportional to 21,671.26, 29,902.70 and 13,171.92

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Solution

The fourth proportional to 21,671.26, 29,902.70 and 13,171.92 is: 18,175.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,671.26 : 29,902.70 = 13,171.92 : x
  2. Step 2: Convert to fraction form
    21,671.26/29,902.70 = 13,171.92/x
  3. Step 3: Cross multiply
    21,671.26x = 29,902.70 × 13,171.92
  4. Step 4: Simplify right side
    21,671.26x = 393,875,972.18
  5. Step 5: Solve for x
    x = 393,875,972.18/21,671.26
  6. Step 6: Final answer
    x = 18,175.04

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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.