Home / 18,144.40-27,216.60-7,757.20

Finding the Fourth Proportional to 18,144.40, 27,216.60 and 7,757.20

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Solution

The fourth proportional to 18,144.40, 27,216.60 and 7,757.20 is: 11,635.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,144.40 : 27,216.60 = 7,757.20 : x
  2. Step 2: Convert to fraction form
    18,144.40/27,216.60 = 7,757.20/x
  3. Step 3: Cross multiply
    18,144.40x = 27,216.60 × 7,757.20
  4. Step 4: Simplify right side
    18,144.40x = 211,124,609.52
  5. Step 5: Solve for x
    x = 211,124,609.52/18,144.40
  6. Step 6: Final answer
    x = 11,635.80

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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.