Home / 21,122.13-29,146.17-12,167.85

Finding the Fourth Proportional to 21,122.13, 29,146.17 and 12,167.85

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Solution

The fourth proportional to 21,122.13, 29,146.17 and 12,167.85 is: 16,790.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,122.13 : 29,146.17 = 12,167.85 : x
  2. Step 2: Convert to fraction form
    21,122.13/29,146.17 = 12,167.85/x
  3. Step 3: Cross multiply
    21,122.13x = 29,146.17 × 12,167.85
  4. Step 4: Simplify right side
    21,122.13x = 354,646,224.63
  5. Step 5: Solve for x
    x = 354,646,224.63/21,122.13
  6. Step 6: Final answer
    x = 16,790.27

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1.5x scale

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.