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Finding the Fourth Proportional to 6,661.80, 9,990.54 and 2,712.06

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Solution

The fourth proportional to 6,661.80, 9,990.54 and 2,712.06 is: 4,067.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,661.80 : 9,990.54 = 2,712.06 : x
  2. Step 2: Convert to fraction form
    6,661.80/9,990.54 = 2,712.06/x
  3. Step 3: Cross multiply
    6,661.80x = 9,990.54 × 2,712.06
  4. Step 4: Simplify right side
    6,661.80x = 27,094,943.91
  5. Step 5: Solve for x
    x = 27,094,943.91/6,661.80
  6. Step 6: Final answer
    x = 4,067.21

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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.