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Finding the Fourth Proportional to 3,781.63, 5,218.65 and 2,125.63

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Solution

The fourth proportional to 3,781.63, 5,218.65 and 2,125.63 is: 2,933.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,781.63 : 5,218.65 = 2,125.63 : x
  2. Step 2: Convert to fraction form
    3,781.63/5,218.65 = 2,125.63/x
  3. Step 3: Cross multiply
    3,781.63x = 5,218.65 × 2,125.63
  4. Step 4: Simplify right side
    3,781.63x = 11,092,882.28
  5. Step 5: Solve for x
    x = 11,092,882.28/3,781.63
  6. Step 6: Final answer
    x = 2,933.36

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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.