Home / 3,513.78-5,266.61-1,321.11

Finding the Fourth Proportional to 3,513.78, 5,266.61 and 1,321.11

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Solution

The fourth proportional to 3,513.78, 5,266.61 and 1,321.11 is: 1,980.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,513.78 : 5,266.61 = 1,321.11 : x
  2. Step 2: Convert to fraction form
    3,513.78/5,266.61 = 1,321.11/x
  3. Step 3: Cross multiply
    3,513.78x = 5,266.61 × 1,321.11
  4. Step 4: Simplify right side
    3,513.78x = 6,957,738.20
  5. Step 5: Solve for x
    x = 6,957,738.20/3,513.78
  6. Step 6: Final answer
    x = 1,980.13

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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.