Home / 12,085.53-18,128.31-3,321.75

Finding the Fourth Proportional to 12,085.53, 18,128.31 and 3,321.75

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Solution

The fourth proportional to 12,085.53, 18,128.31 and 3,321.75 is: 4,982.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,085.53 : 18,128.31 = 3,321.75 : x
  2. Step 2: Convert to fraction form
    12,085.53/18,128.31 = 3,321.75/x
  3. Step 3: Cross multiply
    12,085.53x = 18,128.31 × 3,321.75
  4. Step 4: Simplify right side
    12,085.53x = 60,217,713.74
  5. Step 5: Solve for x
    x = 60,217,713.74/12,085.53
  6. Step 6: Final answer
    x = 4,982.63

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Double scale
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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.