Home / 3,730.38-5,147.92-2,158.57

Finding the Fourth Proportional to 3,730.38, 5,147.92 and 2,158.57

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Solution

The fourth proportional to 3,730.38, 5,147.92 and 2,158.57 is: 2,978.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,730.38 : 5,147.92 = 2,158.57 : x
  2. Step 2: Convert to fraction form
    3,730.38/5,147.92 = 2,158.57/x
  3. Step 3: Cross multiply
    3,730.38x = 5,147.92 × 2,158.57
  4. Step 4: Simplify right side
    3,730.38x = 11,112,145.67
  5. Step 5: Solve for x
    x = 11,112,145.67/3,730.38
  6. Step 6: Final answer
    x = 2,978.82

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1.5x scale

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.