Home / 5,120.75-7,065.63-2,882.72

Finding the Fourth Proportional to 5,120.75, 7,065.63 and 2,882.72

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Solution

The fourth proportional to 5,120.75, 7,065.63 and 2,882.72 is: 3,977.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,120.75 : 7,065.63 = 2,882.72 : x
  2. Step 2: Convert to fraction form
    5,120.75/7,065.63 = 2,882.72/x
  3. Step 3: Cross multiply
    5,120.75x = 7,065.63 × 2,882.72
  4. Step 4: Simplify right side
    5,120.75x = 20,368,250.58
  5. Step 5: Solve for x
    x = 20,368,250.58/5,120.75
  6. Step 6: Final answer
    x = 3,977.59

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Half scale
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Double scale
Find fourth proportional to 5,121.75, 7,067.01 and 2,883.72
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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.