Home / 3,780.20-5,211.96-3,151.64

Finding the Fourth Proportional to 3,780.20, 5,211.96 and 3,151.64

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Solution

The fourth proportional to 3,780.20, 5,211.96 and 3,151.64 is: 4,345.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,780.20 : 5,211.96 = 3,151.64 : x
  2. Step 2: Convert to fraction form
    3,780.20/5,211.96 = 3,151.64/x
  3. Step 3: Cross multiply
    3,780.20x = 5,211.96 × 3,151.64
  4. Step 4: Simplify right side
    3,780.20x = 16,426,221.61
  5. Step 5: Solve for x
    x = 16,426,221.61/3,780.20
  6. Step 6: Final answer
    x = 4,345.33

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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.