Home / 3,781.40-5,220.87-2,895.62

Finding the Fourth Proportional to 3,781.40, 5,220.87 and 2,895.62

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Solution

The fourth proportional to 3,781.40, 5,220.87 and 2,895.62 is: 3,997.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,781.40 : 5,220.87 = 2,895.62 : x
  2. Step 2: Convert to fraction form
    3,781.40/5,220.87 = 2,895.62/x
  3. Step 3: Cross multiply
    3,781.40x = 5,220.87 × 2,895.62
  4. Step 4: Simplify right side
    3,781.40x = 15,117,655.59
  5. Step 5: Solve for x
    x = 15,117,655.59/3,781.40
  6. Step 6: Final answer
    x = 3,997.90

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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.