Home / 20,331.29-28,057.31-11,379.62

Finding the Fourth Proportional to 20,331.29, 28,057.31 and 11,379.62

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Solution

The fourth proportional to 20,331.29, 28,057.31 and 11,379.62 is: 15,703.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,331.29 : 28,057.31 = 11,379.62 : x
  2. Step 2: Convert to fraction form
    20,331.29/28,057.31 = 11,379.62/x
  3. Step 3: Cross multiply
    20,331.29x = 28,057.31 × 11,379.62
  4. Step 4: Simplify right side
    20,331.29x = 319,281,414.18
  5. Step 5: Solve for x
    x = 319,281,414.18/20,331.29
  6. Step 6: Final answer
    x = 15,703.95

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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.