Home / 5,139.50-7,092.51-2,781.66

Finding the Fourth Proportional to 5,139.50, 7,092.51 and 2,781.66

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Solution

The fourth proportional to 5,139.50, 7,092.51 and 2,781.66 is: 3,838.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,139.50 : 7,092.51 = 2,781.66 : x
  2. Step 2: Convert to fraction form
    5,139.50/7,092.51 = 2,781.66/x
  3. Step 3: Cross multiply
    5,139.50x = 7,092.51 × 2,781.66
  4. Step 4: Simplify right side
    5,139.50x = 19,728,951.37
  5. Step 5: Solve for x
    x = 19,728,951.37/5,139.50
  6. Step 6: Final answer
    x = 3,838.69

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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.