Home / 20,331.40-28,057.68-11,377.84

Finding the Fourth Proportional to 20,331.40, 28,057.68 and 11,377.84

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Solution

The fourth proportional to 20,331.40, 28,057.68 and 11,377.84 is: 15,701.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,331.40 : 28,057.68 = 11,377.84 : x
  2. Step 2: Convert to fraction form
    20,331.40/28,057.68 = 11,377.84/x
  3. Step 3: Cross multiply
    20,331.40x = 28,057.68 × 11,377.84
  4. Step 4: Simplify right side
    20,331.40x = 319,235,793.81
  5. Step 5: Solve for x
    x = 319,235,793.81/20,331.40
  6. Step 6: Final answer
    x = 15,701.61

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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.