Home / 3,883.61-5,359.18-2,115.15

Finding the Fourth Proportional to 3,883.61, 5,359.18 and 2,115.15

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Solution

The fourth proportional to 3,883.61, 5,359.18 and 2,115.15 is: 2,918.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,883.61 : 5,359.18 = 2,115.15 : x
  2. Step 2: Convert to fraction form
    3,883.61/5,359.18 = 2,115.15/x
  3. Step 3: Cross multiply
    3,883.61x = 5,359.18 × 2,115.15
  4. Step 4: Simplify right side
    3,883.61x = 11,335,469.58
  5. Step 5: Solve for x
    x = 11,335,469.58/3,883.61
  6. Step 6: Final answer
    x = 2,918.80

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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.