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Finding the Fourth Proportional to 12,187.52, 18,278.68 and 3,868.28

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Solution

The fourth proportional to 12,187.52, 18,278.68 and 3,868.28 is: 5,801.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,187.52 : 18,278.68 = 3,868.28 : x
  2. Step 2: Convert to fraction form
    12,187.52/18,278.68 = 3,868.28/x
  3. Step 3: Cross multiply
    12,187.52x = 18,278.68 × 3,868.28
  4. Step 4: Simplify right side
    12,187.52x = 70,707,052.27
  5. Step 5: Solve for x
    x = 70,707,052.27/12,187.52
  6. Step 6: Final answer
    x = 5,801.59

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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.