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Finding the Fourth Proportional to 6,520.80, 8,998.10 and 3,867.78

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Solution

The fourth proportional to 6,520.80, 8,998.10 and 3,867.78 is: 5,337.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,520.80 : 8,998.10 = 3,867.78 : x
  2. Step 2: Convert to fraction form
    6,520.80/8,998.10 = 3,867.78/x
  3. Step 3: Cross multiply
    6,520.80x = 8,998.10 × 3,867.78
  4. Step 4: Simplify right side
    6,520.80x = 34,802,671.22
  5. Step 5: Solve for x
    x = 34,802,671.22/6,520.80
  6. Step 6: Final answer
    x = 5,337.18

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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.