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Finding the Fourth Proportional to 6,657.80, 9,986.66 and 2,040.80

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Solution

The fourth proportional to 6,657.80, 9,986.66 and 2,040.80 is: 3,061.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,657.80 : 9,986.66 = 2,040.80 : x
  2. Step 2: Convert to fraction form
    6,657.80/9,986.66 = 2,040.80/x
  3. Step 3: Cross multiply
    6,657.80x = 9,986.66 × 2,040.80
  4. Step 4: Simplify right side
    6,657.80x = 20,380,775.73
  5. Step 5: Solve for x
    x = 20,380,775.73/6,657.80
  6. Step 6: Final answer
    x = 3,061.19

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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.