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Finding the Fourth Proportional to 6,638.71, 9,161.38 and 3,654.47

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Solution

The fourth proportional to 6,638.71, 9,161.38 and 3,654.47 is: 5,043.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,638.71 : 9,161.38 = 3,654.47 : x
  2. Step 2: Convert to fraction form
    6,638.71/9,161.38 = 3,654.47/x
  3. Step 3: Cross multiply
    6,638.71x = 9,161.38 × 3,654.47
  4. Step 4: Simplify right side
    6,638.71x = 33,479,933.43
  5. Step 5: Solve for x
    x = 33,479,933.43/6,638.71
  6. Step 6: Final answer
    x = 5,043.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.