Home / 5,120.40-7,065.96-2,882.36

Finding the Fourth Proportional to 5,120.40, 7,065.96 and 2,882.36

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Solution

The fourth proportional to 5,120.40, 7,065.96 and 2,882.36 is: 3,977.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,120.40 : 7,065.96 = 2,882.36 : x
  2. Step 2: Convert to fraction form
    5,120.40/7,065.96 = 2,882.36/x
  3. Step 3: Cross multiply
    5,120.40x = 7,065.96 × 2,882.36
  4. Step 4: Simplify right side
    5,120.40x = 20,366,640.47
  5. Step 5: Solve for x
    x = 20,366,640.47/5,120.40
  6. Step 6: Final answer
    x = 3,977.55

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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.