Home / 21,134.71-29,174.14-12,189.88

Finding the Fourth Proportional to 21,134.71, 29,174.14 and 12,189.88

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Solution

The fourth proportional to 21,134.71, 29,174.14 and 12,189.88 is: 16,826.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,134.71 : 29,174.14 = 12,189.88 : x
  2. Step 2: Convert to fraction form
    21,134.71/29,174.14 = 12,189.88/x
  3. Step 3: Cross multiply
    21,134.71x = 29,174.14 × 12,189.88
  4. Step 4: Simplify right side
    21,134.71x = 355,629,265.70
  5. Step 5: Solve for x
    x = 355,629,265.70/21,134.71
  6. Step 6: Final answer
    x = 16,826.79

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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.