Home / 12,140.40-18,209.97-3,375.39

Finding the Fourth Proportional to 12,140.40, 18,209.97 and 3,375.39

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Solution

The fourth proportional to 12,140.40, 18,209.97 and 3,375.39 is: 5,062.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,140.40 : 18,209.97 = 3,375.39 : x
  2. Step 2: Convert to fraction form
    12,140.40/18,209.97 = 3,375.39/x
  3. Step 3: Cross multiply
    12,140.40x = 18,209.97 × 3,375.39
  4. Step 4: Simplify right side
    12,140.40x = 61,465,750.64
  5. Step 5: Solve for x
    x = 61,465,750.64/12,140.40
  6. Step 6: Final answer
    x = 5,062.91

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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.