Home / 2,110.78-2,896.85-1,987.12

Finding the Fourth Proportional to 2,110.78, 2,896.85 and 1,987.12

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Solution

The fourth proportional to 2,110.78, 2,896.85 and 1,987.12 is: 2,727.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,110.78 : 2,896.85 = 1,987.12 : x
  2. Step 2: Convert to fraction form
    2,110.78/2,896.85 = 1,987.12/x
  3. Step 3: Cross multiply
    2,110.78x = 2,896.85 × 1,987.12
  4. Step 4: Simplify right side
    2,110.78x = 5,756,388.57
  5. Step 5: Solve for x
    x = 5,756,388.57/2,110.78
  6. Step 6: Final answer
    x = 2,727.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.