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Finding the Fourth Proportional to 18,799.31, 28,199.16 and 7,559.85

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Solution

The fourth proportional to 18,799.31, 28,199.16 and 7,559.85 is: 11,339.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,799.31 : 28,199.16 = 7,559.85 : x
  2. Step 2: Convert to fraction form
    18,799.31/28,199.16 = 7,559.85/x
  3. Step 3: Cross multiply
    18,799.31x = 28,199.16 × 7,559.85
  4. Step 4: Simplify right side
    18,799.31x = 213,181,419.73
  5. Step 5: Solve for x
    x = 213,181,419.73/18,799.31
  6. Step 6: Final answer
    x = 11,339.85

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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.