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Finding the Fourth Proportional to 6,638.69, 9,161.53 and 3,654.68

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Solution

The fourth proportional to 6,638.69, 9,161.53 and 3,654.68 is: 5,043.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,638.69 : 9,161.53 = 3,654.68 : x
  2. Step 2: Convert to fraction form
    6,638.69/9,161.53 = 3,654.68/x
  3. Step 3: Cross multiply
    6,638.69x = 9,161.53 × 3,654.68
  4. Step 4: Simplify right side
    6,638.69x = 33,482,460.46
  5. Step 5: Solve for x
    x = 33,482,460.46/6,638.69
  6. Step 6: Final answer
    x = 5,043.53

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Half scale
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Double scale
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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.