Home / 5,139.78-7,092.86-2,781.96

Finding the Fourth Proportional to 5,139.78, 7,092.86 and 2,781.96

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Solution

The fourth proportional to 5,139.78, 7,092.86 and 2,781.96 is: 3,839.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,139.78 : 7,092.86 = 2,781.96 : x
  2. Step 2: Convert to fraction form
    5,139.78/7,092.86 = 2,781.96/x
  3. Step 3: Cross multiply
    5,139.78x = 7,092.86 × 2,781.96
  4. Step 4: Simplify right side
    5,139.78x = 19,732,052.81
  5. Step 5: Solve for x
    x = 19,732,052.81/5,139.78
  6. Step 6: Final answer
    x = 3,839.09

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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.