Home / 3,138.76-4,332.18-1,959.60

Finding the Fourth Proportional to 3,138.76, 4,332.18 and 1,959.60

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Solution

The fourth proportional to 3,138.76, 4,332.18 and 1,959.60 is: 2,704.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,138.76 : 4,332.18 = 1,959.60 : x
  2. Step 2: Convert to fraction form
    3,138.76/4,332.18 = 1,959.60/x
  3. Step 3: Cross multiply
    3,138.76x = 4,332.18 × 1,959.60
  4. Step 4: Simplify right side
    3,138.76x = 8,489,339.93
  5. Step 5: Solve for x
    x = 8,489,339.93/3,138.76
  6. Step 6: Final answer
    x = 2,704.68

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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.