Home / 3,781.50-5,218.47-2,125.50

Finding the Fourth Proportional to 3,781.50, 5,218.47 and 2,125.50

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Solution

The fourth proportional to 3,781.50, 5,218.47 and 2,125.50 is: 2,933.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,781.50 : 5,218.47 = 2,125.50 : x
  2. Step 2: Convert to fraction form
    3,781.50/5,218.47 = 2,125.50/x
  3. Step 3: Cross multiply
    3,781.50x = 5,218.47 × 2,125.50
  4. Step 4: Simplify right side
    3,781.50x = 11,091,857.99
  5. Step 5: Solve for x
    x = 11,091,857.99/3,781.50
  6. Step 6: Final answer
    x = 2,933.19

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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.