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Finding the Fourth Proportional to 8,540.65, 12,810.49 and 3,278.17

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Solution

The fourth proportional to 8,540.65, 12,810.49 and 3,278.17 is: 4,917.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,540.65 : 12,810.49 = 3,278.17 : x
  2. Step 2: Convert to fraction form
    8,540.65/12,810.49 = 3,278.17/x
  3. Step 3: Cross multiply
    8,540.65x = 12,810.49 × 3,278.17
  4. Step 4: Simplify right side
    8,540.65x = 41,994,964.00
  5. Step 5: Solve for x
    x = 41,994,964.00/8,540.65
  6. Step 6: Final answer
    x = 4,917.07

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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.