Home / 7,821.88-11,728.62-3,434.20

Finding the Fourth Proportional to 7,821.88, 11,728.62 and 3,434.20

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Solution

The fourth proportional to 7,821.88, 11,728.62 and 3,434.20 is: 5,149.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,821.88 : 11,728.62 = 3,434.20 : x
  2. Step 2: Convert to fraction form
    7,821.88/11,728.62 = 3,434.20/x
  3. Step 3: Cross multiply
    7,821.88x = 11,728.62 × 3,434.20
  4. Step 4: Simplify right side
    7,821.88x = 40,278,426.80
  5. Step 5: Solve for x
    x = 40,278,426.80/7,821.88
  6. Step 6: Final answer
    x = 5,149.46

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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.