Home / 2,015.11-2,781.03-1,131.09

Finding the Fourth Proportional to 2,015.11, 2,781.03 and 1,131.09

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Solution

The fourth proportional to 2,015.11, 2,781.03 and 1,131.09 is: 1,561.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,015.11 : 2,781.03 = 1,131.09 : x
  2. Step 2: Convert to fraction form
    2,015.11/2,781.03 = 1,131.09/x
  3. Step 3: Cross multiply
    2,015.11x = 2,781.03 × 1,131.09
  4. Step 4: Simplify right side
    2,015.11x = 3,145,595.22
  5. Step 5: Solve for x
    x = 3,145,595.22/2,015.11
  6. Step 6: Final answer
    x = 1,561.00

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Double scale
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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.