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Finding the Fourth Proportional to 8,169.60, 11,276.19 and 6,841.20

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Solution

The fourth proportional to 8,169.60, 11,276.19 and 6,841.20 is: 9,442.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,169.60 : 11,276.19 = 6,841.20 : x
  2. Step 2: Convert to fraction form
    8,169.60/11,276.19 = 6,841.20/x
  3. Step 3: Cross multiply
    8,169.60x = 11,276.19 × 6,841.20
  4. Step 4: Simplify right side
    8,169.60x = 77,142,671.03
  5. Step 5: Solve for x
    x = 77,142,671.03/8,169.60
  6. Step 6: Final answer
    x = 9,442.65

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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.