Home / 18,961.92-28,458.38-13,420.66

Finding the Fourth Proportional to 18,961.92, 28,458.38 and 13,420.66

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Solution

The fourth proportional to 18,961.92, 28,458.38 and 13,420.66 is: 20,141.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,961.92 : 28,458.38 = 13,420.66 : x
  2. Step 2: Convert to fraction form
    18,961.92/28,458.38 = 13,420.66/x
  3. Step 3: Cross multiply
    18,961.92x = 28,458.38 × 13,420.66
  4. Step 4: Simplify right side
    18,961.92x = 381,930,242.13
  5. Step 5: Solve for x
    x = 381,930,242.13/18,961.92
  6. Step 6: Final answer
    x = 20,141.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.