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Finding the Fourth Proportional to 12,191.46, 18,287.20 and 2,957.46

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Solution

The fourth proportional to 12,191.46, 18,287.20 and 2,957.46 is: 4,436.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,191.46 : 18,287.20 = 2,957.46 : x
  2. Step 2: Convert to fraction form
    12,191.46/18,287.20 = 2,957.46/x
  3. Step 3: Cross multiply
    12,191.46x = 18,287.20 × 2,957.46
  4. Step 4: Simplify right side
    12,191.46x = 54,083,662.51
  5. Step 5: Solve for x
    x = 54,083,662.51/12,191.46
  6. Step 6: Final answer
    x = 4,436.19

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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.