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Finding the Fourth Proportional to 6,656.40, 9,990.76 and 3,371.80

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Solution

The fourth proportional to 6,656.40, 9,990.76 and 3,371.80 is: 5,060.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,656.40 : 9,990.76 = 3,371.80 : x
  2. Step 2: Convert to fraction form
    6,656.40/9,990.76 = 3,371.80/x
  3. Step 3: Cross multiply
    6,656.40x = 9,990.76 × 3,371.80
  4. Step 4: Simplify right side
    6,656.40x = 33,686,844.57
  5. Step 5: Solve for x
    x = 33,686,844.57/6,656.40
  6. Step 6: Final answer
    x = 5,060.82

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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.