Home / 3,781.80-5,216.58-2,660.76

Finding the Fourth Proportional to 3,781.80, 5,216.58 and 2,660.76

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Solution

The fourth proportional to 3,781.80, 5,216.58 and 2,660.76 is: 3,670.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,781.80 : 5,216.58 = 2,660.76 : x
  2. Step 2: Convert to fraction form
    3,781.80/5,216.58 = 2,660.76/x
  3. Step 3: Cross multiply
    3,781.80x = 5,216.58 × 2,660.76
  4. Step 4: Simplify right side
    3,781.80x = 13,880,067.40
  5. Step 5: Solve for x
    x = 13,880,067.40/3,781.80
  6. Step 6: Final answer
    x = 3,670.23

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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.