Home / 18,987.55-28,481.31-8,454.85

Finding the Fourth Proportional to 18,987.55, 28,481.31 and 8,454.85

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Solution

The fourth proportional to 18,987.55, 28,481.31 and 8,454.85 is: 12,682.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,987.55 : 28,481.31 = 8,454.85 : x
  2. Step 2: Convert to fraction form
    18,987.55/28,481.31 = 8,454.85/x
  3. Step 3: Cross multiply
    18,987.55x = 28,481.31 × 8,454.85
  4. Step 4: Simplify right side
    18,987.55x = 240,805,132.65
  5. Step 5: Solve for x
    x = 240,805,132.65/18,987.55
  6. Step 6: Final answer
    x = 12,682.27

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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.