Home / 15,331.38-21,162.13-11,151.78

Finding the Fourth Proportional to 15,331.38, 21,162.13 and 11,151.78

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Solution

The fourth proportional to 15,331.38, 21,162.13 and 11,151.78 is: 15,392.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,331.38 : 21,162.13 = 11,151.78 : x
  2. Step 2: Convert to fraction form
    15,331.38/21,162.13 = 11,151.78/x
  3. Step 3: Cross multiply
    15,331.38x = 21,162.13 × 11,151.78
  4. Step 4: Simplify right side
    15,331.38x = 235,995,310.85
  5. Step 5: Solve for x
    x = 235,995,310.85/15,331.38
  6. Step 6: Final answer
    x = 15,392.96

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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.