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Finding the Fourth Proportional to 6,326.88, 8,711.28 and 5,380.80

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Solution

The fourth proportional to 6,326.88, 8,711.28 and 5,380.80 is: 7,408.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,326.88 : 8,711.28 = 5,380.80 : x
  2. Step 2: Convert to fraction form
    6,326.88/8,711.28 = 5,380.80/x
  3. Step 3: Cross multiply
    6,326.88x = 8,711.28 × 5,380.80
  4. Step 4: Simplify right side
    6,326.88x = 46,873,655.42
  5. Step 5: Solve for x
    x = 46,873,655.42/6,326.88
  6. Step 6: Final answer
    x = 7,408.65

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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.