Home / 3,120.08-4,296.53-2,788.39

Finding the Fourth Proportional to 3,120.08, 4,296.53 and 2,788.39

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Solution

The fourth proportional to 3,120.08, 4,296.53 and 2,788.39 is: 3,839.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.08 : 4,296.53 = 2,788.39 : x
  2. Step 2: Convert to fraction form
    3,120.08/4,296.53 = 2,788.39/x
  3. Step 3: Cross multiply
    3,120.08x = 4,296.53 × 2,788.39
  4. Step 4: Simplify right side
    3,120.08x = 11,980,365.86
  5. Step 5: Solve for x
    x = 11,980,365.86/3,120.08
  6. Step 6: Final answer
    x = 3,839.76

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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.