Home / 11,081.20-16,621.80-7,970.80

Finding the Fourth Proportional to 11,081.20, 16,621.80 and 7,970.80

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Solution

The fourth proportional to 11,081.20, 16,621.80 and 7,970.80 is: 11,956.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,081.20 : 16,621.80 = 7,970.80 : x
  2. Step 2: Convert to fraction form
    11,081.20/16,621.80 = 7,970.80/x
  3. Step 3: Cross multiply
    11,081.20x = 16,621.80 × 7,970.80
  4. Step 4: Simplify right side
    11,081.20x = 132,489,043.44
  5. Step 5: Solve for x
    x = 132,489,043.44/11,081.20
  6. Step 6: Final answer
    x = 11,956.20

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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.