Home / 3,971.92-5,959.76-1,781.28

Finding the Fourth Proportional to 3,971.92, 5,959.76 and 1,781.28

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Solution

The fourth proportional to 3,971.92, 5,959.76 and 1,781.28 is: 2,672.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,971.92 : 5,959.76 = 1,781.28 : x
  2. Step 2: Convert to fraction form
    3,971.92/5,959.76 = 1,781.28/x
  3. Step 3: Cross multiply
    3,971.92x = 5,959.76 × 1,781.28
  4. Step 4: Simplify right side
    3,971.92x = 10,616,001.29
  5. Step 5: Solve for x
    x = 10,616,001.29/3,971.92
  6. Step 6: Final answer
    x = 2,672.76

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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.