Home / 3,121.64-4,685.83-2,777.18

Finding the Fourth Proportional to 3,121.64, 4,685.83 and 2,777.18

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Solution

The fourth proportional to 3,121.64, 4,685.83 and 2,777.18 is: 4,168.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.64 : 4,685.83 = 2,777.18 : x
  2. Step 2: Convert to fraction form
    3,121.64/4,685.83 = 2,777.18/x
  3. Step 3: Cross multiply
    3,121.64x = 4,685.83 × 2,777.18
  4. Step 4: Simplify right side
    3,121.64x = 13,013,393.36
  5. Step 5: Solve for x
    x = 13,013,393.36/3,121.64
  6. Step 6: Final answer
    x = 4,168.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.