Home / 5,120.31-7,065.97-2,882.15

Finding the Fourth Proportional to 5,120.31, 7,065.97 and 2,882.15

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Solution

The fourth proportional to 5,120.31, 7,065.97 and 2,882.15 is: 3,977.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,120.31 : 7,065.97 = 2,882.15 : x
  2. Step 2: Convert to fraction form
    5,120.31/7,065.97 = 2,882.15/x
  3. Step 3: Cross multiply
    5,120.31x = 7,065.97 × 2,882.15
  4. Step 4: Simplify right side
    5,120.31x = 20,365,169.40
  5. Step 5: Solve for x
    x = 20,365,169.40/5,120.31
  6. Step 6: Final answer
    x = 3,977.33

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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.