Home / 21,122.15-29,149.92-12,169.49

Finding the Fourth Proportional to 21,122.15, 29,149.92 and 12,169.49

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Solution

The fourth proportional to 21,122.15, 29,149.92 and 12,169.49 is: 16,794.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,122.15 : 29,149.92 = 12,169.49 : x
  2. Step 2: Convert to fraction form
    21,122.15/29,149.92 = 12,169.49/x
  3. Step 3: Cross multiply
    21,122.15x = 29,149.92 × 12,169.49
  4. Step 4: Simplify right side
    21,122.15x = 354,739,659.94
  5. Step 5: Solve for x
    x = 354,739,659.94/21,122.15
  6. Step 6: Final answer
    x = 16,794.68

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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.