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Finding the Fourth Proportional to 6,662.46, 9,991.80 and 1,982.28

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Solution

The fourth proportional to 6,662.46, 9,991.80 and 1,982.28 is: 2,972.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,662.46 : 9,991.80 = 1,982.28 : x
  2. Step 2: Convert to fraction form
    6,662.46/9,991.80 = 1,982.28/x
  3. Step 3: Cross multiply
    6,662.46x = 9,991.80 × 1,982.28
  4. Step 4: Simplify right side
    6,662.46x = 19,806,545.30
  5. Step 5: Solve for x
    x = 19,806,545.30/6,662.46
  6. Step 6: Final answer
    x = 2,972.86

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Double scale
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1.5x scale

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.