Home / 21,115.92-29,142.99-12,162.54

Finding the Fourth Proportional to 21,115.92, 29,142.99 and 12,162.54

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Solution

The fourth proportional to 21,115.92, 29,142.99 and 12,162.54 is: 16,786.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,115.92 : 29,142.99 = 12,162.54 : x
  2. Step 2: Convert to fraction form
    21,115.92/29,142.99 = 12,162.54/x
  3. Step 3: Cross multiply
    21,115.92x = 29,142.99 × 12,162.54
  4. Step 4: Simplify right side
    21,115.92x = 354,452,781.59
  5. Step 5: Solve for x
    x = 354,452,781.59/21,115.92
  6. Step 6: Final answer
    x = 16,786.04

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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.