Home / 21,092.65-29,109.13-12,139.95

Finding the Fourth Proportional to 21,092.65, 29,109.13 and 12,139.95

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Solution

The fourth proportional to 21,092.65, 29,109.13 and 12,139.95 is: 16,753.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,092.65 : 29,109.13 = 12,139.95 : x
  2. Step 2: Convert to fraction form
    21,092.65/29,109.13 = 12,139.95/x
  3. Step 3: Cross multiply
    21,092.65x = 29,109.13 × 12,139.95
  4. Step 4: Simplify right side
    21,092.65x = 353,383,461.55
  5. Step 5: Solve for x
    x = 353,383,461.55/21,092.65
  6. Step 6: Final answer
    x = 16,753.87

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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.