Home / 3,146.88-4,343.10-2,151.78

Finding the Fourth Proportional to 3,146.88, 4,343.10 and 2,151.78

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Solution

The fourth proportional to 3,146.88, 4,343.10 and 2,151.78 is: 2,969.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,146.88 : 4,343.10 = 2,151.78 : x
  2. Step 2: Convert to fraction form
    3,146.88/4,343.10 = 2,151.78/x
  3. Step 3: Cross multiply
    3,146.88x = 4,343.10 × 2,151.78
  4. Step 4: Simplify right side
    3,146.88x = 9,345,395.72
  5. Step 5: Solve for x
    x = 9,345,395.72/3,146.88
  6. Step 6: Final answer
    x = 2,969.73

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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.