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Finding the Fourth Proportional to 6,641.72, 9,165.36 and 3,657.56

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Solution

The fourth proportional to 6,641.72, 9,165.36 and 3,657.56 is: 5,047.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,641.72 : 9,165.36 = 3,657.56 : x
  2. Step 2: Convert to fraction form
    6,641.72/9,165.36 = 3,657.56/x
  3. Step 3: Cross multiply
    6,641.72x = 9,165.36 × 3,657.56
  4. Step 4: Simplify right side
    6,641.72x = 33,522,854.12
  5. Step 5: Solve for x
    x = 33,522,854.12/6,641.72
  6. Step 6: Final answer
    x = 5,047.32

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Half scale
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Double scale
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Similar ratio
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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.