Home / 2,122.72-3,186.48-1,877.20

Finding the Fourth Proportional to 2,122.72, 3,186.48 and 1,877.20

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Solution

The fourth proportional to 2,122.72, 3,186.48 and 1,877.20 is: 2,817.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,122.72 : 3,186.48 = 1,877.20 : x
  2. Step 2: Convert to fraction form
    2,122.72/3,186.48 = 1,877.20/x
  3. Step 3: Cross multiply
    2,122.72x = 3,186.48 × 1,877.20
  4. Step 4: Simplify right side
    2,122.72x = 5,981,660.26
  5. Step 5: Solve for x
    x = 5,981,660.26/2,122.72
  6. Step 6: Final answer
    x = 2,817.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.