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Finding the Fourth Proportional to 12,191.38, 18,287.07 and 2,957.38

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Solution

The fourth proportional to 12,191.38, 18,287.07 and 2,957.38 is: 4,436.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,191.38 : 18,287.07 = 2,957.38 : x
  2. Step 2: Convert to fraction form
    12,191.38/18,287.07 = 2,957.38/x
  3. Step 3: Cross multiply
    12,191.38x = 18,287.07 × 2,957.38
  4. Step 4: Simplify right side
    12,191.38x = 54,081,723.64
  5. Step 5: Solve for x
    x = 54,081,723.64/12,191.38
  6. Step 6: Final answer
    x = 4,436.06

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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.