Home / 7,142.78-10,721.16-3,862.89

Finding the Fourth Proportional to 7,142.78, 10,721.16 and 3,862.89

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Solution

The fourth proportional to 7,142.78, 10,721.16 and 3,862.89 is: 5,798.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,142.78 : 10,721.16 = 3,862.89 : x
  2. Step 2: Convert to fraction form
    7,142.78/10,721.16 = 3,862.89/x
  3. Step 3: Cross multiply
    7,142.78x = 10,721.16 × 3,862.89
  4. Step 4: Simplify right side
    7,142.78x = 41,414,661.75
  5. Step 5: Solve for x
    x = 41,414,661.75/7,142.78
  6. Step 6: Final answer
    x = 5,798.11

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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.