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Finding the Fourth Proportional to 6,644.68, 9,966.96 and 1,965

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Solution

The fourth proportional to 6,644.68, 9,966.96 and 1,965 is: 2,947.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,644.68 : 9,966.96 = 1,965 : x
  2. Step 2: Convert to fraction form
    6,644.68/9,966.96 = 1,965/x
  3. Step 3: Cross multiply
    6,644.68x = 9,966.96 × 1,965
  4. Step 4: Simplify right side
    6,644.68x = 19,585,076.40
  5. Step 5: Solve for x
    x = 19,585,076.40/6,644.68
  6. Step 6: Final answer
    x = 2,947.48

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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.