Home / 7,185.57-9,915.51-3,998.61

Finding the Fourth Proportional to 7,185.57, 9,915.51 and 3,998.61

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Solution

The fourth proportional to 7,185.57, 9,915.51 and 3,998.61 is: 5,517.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,185.57 : 9,915.51 = 3,998.61 : x
  2. Step 2: Convert to fraction form
    7,185.57/9,915.51 = 3,998.61/x
  3. Step 3: Cross multiply
    7,185.57x = 9,915.51 × 3,998.61
  4. Step 4: Simplify right side
    7,185.57x = 39,648,257.44
  5. Step 5: Solve for x
    x = 39,648,257.44/7,185.57
  6. Step 6: Final answer
    x = 5,517.76

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Half scale
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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.