Home / 12,191.73-18,287.60-3,426.65

Finding the Fourth Proportional to 12,191.73, 18,287.60 and 3,426.65

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Solution

The fourth proportional to 12,191.73, 18,287.60 and 3,426.65 is: 5,139.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,191.73 : 18,287.60 = 3,426.65 : x
  2. Step 2: Convert to fraction form
    12,191.73/18,287.60 = 3,426.65/x
  3. Step 3: Cross multiply
    12,191.73x = 18,287.60 × 3,426.65
  4. Step 4: Simplify right side
    12,191.73x = 62,665,095.97
  5. Step 5: Solve for x
    x = 62,665,095.97/12,191.73
  6. Step 6: Final answer
    x = 5,139.97

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Double scale
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Similar ratio
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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.