Home / 5,139.66-7,092.78-2,781.84

Finding the Fourth Proportional to 5,139.66, 7,092.78 and 2,781.84

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Solution

The fourth proportional to 5,139.66, 7,092.78 and 2,781.84 is: 3,838.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,139.66 : 7,092.78 = 2,781.84 : x
  2. Step 2: Convert to fraction form
    5,139.66/7,092.78 = 2,781.84/x
  3. Step 3: Cross multiply
    5,139.66x = 7,092.78 × 2,781.84
  4. Step 4: Simplify right side
    5,139.66x = 19,730,979.12
  5. Step 5: Solve for x
    x = 19,730,979.12/5,139.66
  6. Step 6: Final answer
    x = 3,838.97

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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.