Home / 7,387.20-11,080.80-5,321.70

Finding the Fourth Proportional to 7,387.20, 11,080.80 and 5,321.70

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Solution

The fourth proportional to 7,387.20, 11,080.80 and 5,321.70 is: 7,982.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,387.20 : 11,080.80 = 5,321.70 : x
  2. Step 2: Convert to fraction form
    7,387.20/11,080.80 = 5,321.70/x
  3. Step 3: Cross multiply
    7,387.20x = 11,080.80 × 5,321.70
  4. Step 4: Simplify right side
    7,387.20x = 58,968,693.36
  5. Step 5: Solve for x
    x = 58,968,693.36/7,387.20
  6. Step 6: Final answer
    x = 7,982.55

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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.