Home / 3,138.30-4,332.78-2,019.66

Finding the Fourth Proportional to 3,138.30, 4,332.78 and 2,019.66

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Solution

The fourth proportional to 3,138.30, 4,332.78 and 2,019.66 is: 2,788.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,138.30 : 4,332.78 = 2,019.66 : x
  2. Step 2: Convert to fraction form
    3,138.30/4,332.78 = 2,019.66/x
  3. Step 3: Cross multiply
    3,138.30x = 4,332.78 × 2,019.66
  4. Step 4: Simplify right side
    3,138.30x = 8,750,742.45
  5. Step 5: Solve for x
    x = 8,750,742.45/3,138.30
  6. Step 6: Final answer
    x = 2,788.37

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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.