Home / 12,375.20-18,567.05-3,611.40

Finding the Fourth Proportional to 12,375.20, 18,567.05 and 3,611.40

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Solution

The fourth proportional to 12,375.20, 18,567.05 and 3,611.40 is: 5,418.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,375.20 : 18,567.05 = 3,611.40 : x
  2. Step 2: Convert to fraction form
    12,375.20/18,567.05 = 3,611.40/x
  3. Step 3: Cross multiply
    12,375.20x = 18,567.05 × 3,611.40
  4. Step 4: Simplify right side
    12,375.20x = 67,053,026.31
  5. Step 5: Solve for x
    x = 67,053,026.31/12,375.20
  6. Step 6: Final answer
    x = 5,418.34

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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.