Home / 28,481.06-42,722.28-8,759.78

Finding the Fourth Proportional to 28,481.06, 42,722.28 and 8,759.78

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Solution

The fourth proportional to 28,481.06, 42,722.28 and 8,759.78 is: 13,139.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,481.06 : 42,722.28 = 8,759.78 : x
  2. Step 2: Convert to fraction form
    28,481.06/42,722.28 = 8,759.78/x
  3. Step 3: Cross multiply
    28,481.06x = 42,722.28 × 8,759.78
  4. Step 4: Simplify right side
    28,481.06x = 374,237,773.90
  5. Step 5: Solve for x
    x = 374,237,773.90/28,481.06
  6. Step 6: Final answer
    x = 13,139.88

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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.