Home / 3,711.90-5,122.16-2,118.61

Finding the Fourth Proportional to 3,711.90, 5,122.16 and 2,118.61

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Solution

The fourth proportional to 3,711.90, 5,122.16 and 2,118.61 is: 2,923.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,711.90 : 5,122.16 = 2,118.61 : x
  2. Step 2: Convert to fraction form
    3,711.90/5,122.16 = 2,118.61/x
  3. Step 3: Cross multiply
    3,711.90x = 5,122.16 × 2,118.61
  4. Step 4: Simplify right side
    3,711.90x = 10,851,840.30
  5. Step 5: Solve for x
    x = 10,851,840.30/3,711.90
  6. Step 6: Final answer
    x = 2,923.53

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Half scale
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Double scale
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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.