Home / 20,578.38-28,398.24-11,146.92

Finding the Fourth Proportional to 20,578.38, 28,398.24 and 11,146.92

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Solution

The fourth proportional to 20,578.38, 28,398.24 and 11,146.92 is: 15,382.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,578.38 : 28,398.24 = 11,146.92 : x
  2. Step 2: Convert to fraction form
    20,578.38/28,398.24 = 11,146.92/x
  3. Step 3: Cross multiply
    20,578.38x = 28,398.24 × 11,146.92
  4. Step 4: Simplify right side
    20,578.38x = 316,552,909.42
  5. Step 5: Solve for x
    x = 316,552,909.42/20,578.38
  6. Step 6: Final answer
    x = 15,382.79

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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.