Home / 3,781.79-5,218.70-2,188.18

Finding the Fourth Proportional to 3,781.79, 5,218.70 and 2,188.18

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Solution

The fourth proportional to 3,781.79, 5,218.70 and 2,188.18 is: 3,019.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,781.79 : 5,218.70 = 2,188.18 : x
  2. Step 2: Convert to fraction form
    3,781.79/5,218.70 = 2,188.18/x
  3. Step 3: Cross multiply
    3,781.79x = 5,218.70 × 2,188.18
  4. Step 4: Simplify right side
    3,781.79x = 11,419,430.98
  5. Step 5: Solve for x
    x = 11,419,430.98/3,781.79
  6. Step 6: Final answer
    x = 3,019.59

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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.