Home / 3,651.60-5,037.38-2,158.78

Finding the Fourth Proportional to 3,651.60, 5,037.38 and 2,158.78

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Solution

The fourth proportional to 3,651.60, 5,037.38 and 2,158.78 is: 2,978.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,651.60 : 5,037.38 = 2,158.78 : x
  2. Step 2: Convert to fraction form
    3,651.60/5,037.38 = 2,158.78/x
  3. Step 3: Cross multiply
    3,651.60x = 5,037.38 × 2,158.78
  4. Step 4: Simplify right side
    3,651.60x = 10,874,595.20
  5. Step 5: Solve for x
    x = 10,874,595.20/3,651.60
  6. Step 6: Final answer
    x = 2,978.04

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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.