Home / 2,986.18-4,120.38-2,266.90

Finding the Fourth Proportional to 2,986.18, 4,120.38 and 2,266.90

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Solution

The fourth proportional to 2,986.18, 4,120.38 and 2,266.90 is: 3,127.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,986.18 : 4,120.38 = 2,266.90 : x
  2. Step 2: Convert to fraction form
    2,986.18/4,120.38 = 2,266.90/x
  3. Step 3: Cross multiply
    2,986.18x = 4,120.38 × 2,266.90
  4. Step 4: Simplify right side
    2,986.18x = 9,340,489.42
  5. Step 5: Solve for x
    x = 9,340,489.42/2,986.18
  6. Step 6: Final answer
    x = 3,127.91

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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.