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Finding the Fourth Proportional to 6,387.80, 8,815.07 and 3,593.30

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Solution

The fourth proportional to 6,387.80, 8,815.07 and 3,593.30 is: 4,958.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,387.80 : 8,815.07 = 3,593.30 : x
  2. Step 2: Convert to fraction form
    6,387.80/8,815.07 = 3,593.30/x
  3. Step 3: Cross multiply
    6,387.80x = 8,815.07 × 3,593.30
  4. Step 4: Simplify right side
    6,387.80x = 31,675,191.03
  5. Step 5: Solve for x
    x = 31,675,191.03/6,387.80
  6. Step 6: Final answer
    x = 4,958.70

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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.