Home / 3,120.20-4,306.02-2,126.60

Finding the Fourth Proportional to 3,120.20, 4,306.02 and 2,126.60

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Solution

The fourth proportional to 3,120.20, 4,306.02 and 2,126.60 is: 2,934.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.20 : 4,306.02 = 2,126.60 : x
  2. Step 2: Convert to fraction form
    3,120.20/4,306.02 = 2,126.60/x
  3. Step 3: Cross multiply
    3,120.20x = 4,306.02 × 2,126.60
  4. Step 4: Simplify right side
    3,120.20x = 9,157,182.13
  5. Step 5: Solve for x
    x = 9,157,182.13/3,120.20
  6. Step 6: Final answer
    x = 2,934.81

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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.