Home / 3,711.72-5,120.16-2,312.04

Finding the Fourth Proportional to 3,711.72, 5,120.16 and 2,312.04

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Solution

The fourth proportional to 3,711.72, 5,120.16 and 2,312.04 is: 3,189.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,711.72 : 5,120.16 = 2,312.04 : x
  2. Step 2: Convert to fraction form
    3,711.72/5,120.16 = 2,312.04/x
  3. Step 3: Cross multiply
    3,711.72x = 5,120.16 × 2,312.04
  4. Step 4: Simplify right side
    3,711.72x = 11,838,014.73
  5. Step 5: Solve for x
    x = 11,838,014.73/3,711.72
  6. Step 6: Final answer
    x = 3,189.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.