Home / 3,781.98-5,218.80-2,103.12

Finding the Fourth Proportional to 3,781.98, 5,218.80 and 2,103.12

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Solution

The fourth proportional to 3,781.98, 5,218.80 and 2,103.12 is: 2,902.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,781.98 : 5,218.80 = 2,103.12 : x
  2. Step 2: Convert to fraction form
    3,781.98/5,218.80 = 2,103.12/x
  3. Step 3: Cross multiply
    3,781.98x = 5,218.80 × 2,103.12
  4. Step 4: Simplify right side
    3,781.98x = 10,975,762.66
  5. Step 5: Solve for x
    x = 10,975,762.66/3,781.98
  6. Step 6: Final answer
    x = 2,902.12

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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.