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Finding the Fourth Proportional to 12,140.28, 18,210.42 and 3,375.88

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Solution

The fourth proportional to 12,140.28, 18,210.42 and 3,375.88 is: 5,063.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,140.28 : 18,210.42 = 3,375.88 : x
  2. Step 2: Convert to fraction form
    12,140.28/18,210.42 = 3,375.88/x
  3. Step 3: Cross multiply
    12,140.28x = 18,210.42 × 3,375.88
  4. Step 4: Simplify right side
    12,140.28x = 61,476,147.14
  5. Step 5: Solve for x
    x = 61,476,147.14/12,140.28
  6. Step 6: Final answer
    x = 5,063.82

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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.