Home / 5,139.40-7,092.37-2,781.54

Finding the Fourth Proportional to 5,139.40, 7,092.37 and 2,781.54

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Solution

The fourth proportional to 5,139.40, 7,092.37 and 2,781.54 is: 3,838.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,139.40 : 7,092.37 = 2,781.54 : x
  2. Step 2: Convert to fraction form
    5,139.40/7,092.37 = 2,781.54/x
  3. Step 3: Cross multiply
    5,139.40x = 7,092.37 × 2,781.54
  4. Step 4: Simplify right side
    5,139.40x = 19,727,661.48
  5. Step 5: Solve for x
    x = 19,727,661.48/5,139.40
  6. Step 6: Final answer
    x = 3,838.51

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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.