Home / 5,165.68-7,128.56-2,807.88

Finding the Fourth Proportional to 5,165.68, 7,128.56 and 2,807.88

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Solution

The fourth proportional to 5,165.68, 7,128.56 and 2,807.88 is: 3,874.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,165.68 : 7,128.56 = 2,807.88 : x
  2. Step 2: Convert to fraction form
    5,165.68/7,128.56 = 2,807.88/x
  3. Step 3: Cross multiply
    5,165.68x = 7,128.56 × 2,807.88
  4. Step 4: Simplify right side
    5,165.68x = 20,016,141.05
  5. Step 5: Solve for x
    x = 20,016,141.05/5,165.68
  6. Step 6: Final answer
    x = 3,874.83

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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.