Home / 5,139.77-7,092.87-2,781.95

Finding the Fourth Proportional to 5,139.77, 7,092.87 and 2,781.95

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Solution

The fourth proportional to 5,139.77, 7,092.87 and 2,781.95 is: 3,839.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,139.77 : 7,092.87 = 2,781.95 : x
  2. Step 2: Convert to fraction form
    5,139.77/7,092.87 = 2,781.95/x
  3. Step 3: Cross multiply
    5,139.77x = 7,092.87 × 2,781.95
  4. Step 4: Simplify right side
    5,139.77x = 19,732,009.70
  5. Step 5: Solve for x
    x = 19,732,009.70/5,139.77
  6. Step 6: Final answer
    x = 3,839.08

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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.