Home / 5,161.12-7,122.60-3,143.95

Finding the Fourth Proportional to 5,161.12, 7,122.60 and 3,143.95

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Solution

The fourth proportional to 5,161.12, 7,122.60 and 3,143.95 is: 4,338.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,161.12 : 7,122.60 = 3,143.95 : x
  2. Step 2: Convert to fraction form
    5,161.12/7,122.60 = 3,143.95/x
  3. Step 3: Cross multiply
    5,161.12x = 7,122.60 × 3,143.95
  4. Step 4: Simplify right side
    5,161.12x = 22,393,080.46
  5. Step 5: Solve for x
    x = 22,393,080.46/5,161.12
  6. Step 6: Final answer
    x = 4,338.80

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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.