Home / 12,120.52-18,180.80-5,199.88

Finding the Fourth Proportional to 12,120.52, 18,180.80 and 5,199.88

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Solution

The fourth proportional to 12,120.52, 18,180.80 and 5,199.88 is: 7,799.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,120.52 : 18,180.80 = 5,199.88 : x
  2. Step 2: Convert to fraction form
    12,120.52/18,180.80 = 5,199.88/x
  3. Step 3: Cross multiply
    12,120.52x = 18,180.80 × 5,199.88
  4. Step 4: Simplify right side
    12,120.52x = 94,537,978.30
  5. Step 5: Solve for x
    x = 94,537,978.30/12,120.52
  6. Step 6: Final answer
    x = 7,799.83

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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.