Home / 5,079.27-7,008.76-2,840.78

Finding the Fourth Proportional to 5,079.27, 7,008.76 and 2,840.78

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Solution

The fourth proportional to 5,079.27, 7,008.76 and 2,840.78 is: 3,919.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,079.27 : 7,008.76 = 2,840.78 : x
  2. Step 2: Convert to fraction form
    5,079.27/7,008.76 = 2,840.78/x
  3. Step 3: Cross multiply
    5,079.27x = 7,008.76 × 2,840.78
  4. Step 4: Simplify right side
    5,079.27x = 19,910,355.65
  5. Step 5: Solve for x
    x = 19,910,355.65/5,079.27
  6. Step 6: Final answer
    x = 3,919.92

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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.