Home / 2,781.21-3,833.98-2,116.91

Finding the Fourth Proportional to 2,781.21, 3,833.98 and 2,116.91

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Solution

The fourth proportional to 2,781.21, 3,833.98 and 2,116.91 is: 2,918.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,781.21 : 3,833.98 = 2,116.91 : x
  2. Step 2: Convert to fraction form
    2,781.21/3,833.98 = 2,116.91/x
  3. Step 3: Cross multiply
    2,781.21x = 3,833.98 × 2,116.91
  4. Step 4: Simplify right side
    2,781.21x = 8,116,171.43
  5. Step 5: Solve for x
    x = 8,116,171.43/2,781.21
  6. Step 6: Final answer
    x = 2,918.22

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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.