Home / 28,768.20-43,152.30-7,991.70

Finding the Fourth Proportional to 28,768.20, 43,152.30 and 7,991.70

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Solution

The fourth proportional to 28,768.20, 43,152.30 and 7,991.70 is: 11,987.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,768.20 : 43,152.30 = 7,991.70 : x
  2. Step 2: Convert to fraction form
    28,768.20/43,152.30 = 7,991.70/x
  3. Step 3: Cross multiply
    28,768.20x = 43,152.30 × 7,991.70
  4. Step 4: Simplify right side
    28,768.20x = 344,860,235.91
  5. Step 5: Solve for x
    x = 344,860,235.91/28,768.20
  6. Step 6: Final answer
    x = 11,987.55

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Similar ratio
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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.