Home / 12,139.50-18,207.20-3,375.30

Finding the Fourth Proportional to 12,139.50, 18,207.20 and 3,375.30

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Solution

The fourth proportional to 12,139.50, 18,207.20 and 3,375.30 is: 5,062.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,139.50 : 18,207.20 = 3,375.30 : x
  2. Step 2: Convert to fraction form
    12,139.50/18,207.20 = 3,375.30/x
  3. Step 3: Cross multiply
    12,139.50x = 18,207.20 × 3,375.30
  4. Step 4: Simplify right side
    12,139.50x = 61,454,762.16
  5. Step 5: Solve for x
    x = 61,454,762.16/12,139.50
  6. Step 6: Final answer
    x = 5,062.38

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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.