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Finding the Fourth Proportional to 12,578.97, 18,868.46 and 12,372.12

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Solution

The fourth proportional to 12,578.97, 18,868.46 and 12,372.12 is: 18,558.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,578.97 : 18,868.46 = 12,372.12 : x
  2. Step 2: Convert to fraction form
    12,578.97/18,868.46 = 12,372.12/x
  3. Step 3: Cross multiply
    12,578.97x = 18,868.46 × 12,372.12
  4. Step 4: Simplify right side
    12,578.97x = 233,442,851.34
  5. Step 5: Solve for x
    x = 233,442,851.34/12,578.97
  6. Step 6: Final answer
    x = 18,558.18

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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.