Home / 3,121.01-4,679.20-1,888.12

Finding the Fourth Proportional to 3,121.01, 4,679.20 and 1,888.12

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Solution

The fourth proportional to 3,121.01, 4,679.20 and 1,888.12 is: 2,830.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.01 : 4,679.20 = 1,888.12 : x
  2. Step 2: Convert to fraction form
    3,121.01/4,679.20 = 1,888.12/x
  3. Step 3: Cross multiply
    3,121.01x = 4,679.20 × 1,888.12
  4. Step 4: Simplify right side
    3,121.01x = 8,834,891.10
  5. Step 5: Solve for x
    x = 8,834,891.10/3,121.01
  6. Step 6: Final answer
    x = 2,830.78

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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.