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Finding the Fourth Proportional to 8,841.38, 12,201.10 and 5,115.38

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Solution

The fourth proportional to 8,841.38, 12,201.10 and 5,115.38 is: 7,059.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,841.38 : 12,201.10 = 5,115.38 : x
  2. Step 2: Convert to fraction form
    8,841.38/12,201.10 = 5,115.38/x
  3. Step 3: Cross multiply
    8,841.38x = 12,201.10 × 5,115.38
  4. Step 4: Simplify right side
    8,841.38x = 62,413,189.12
  5. Step 5: Solve for x
    x = 62,413,189.12/8,841.38
  6. Step 6: Final answer
    x = 7,059.22

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Half scale
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Double scale
Find fourth proportional to 8,842.38, 12,202.48 and 5,116.38
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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.