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Finding the Fourth Proportional to 8,608.86, 11,878.74 and 5,072.76

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Solution

The fourth proportional to 8,608.86, 11,878.74 and 5,072.76 is: 6,999.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,608.86 : 11,878.74 = 5,072.76 : x
  2. Step 2: Convert to fraction form
    8,608.86/11,878.74 = 5,072.76/x
  3. Step 3: Cross multiply
    8,608.86x = 11,878.74 × 5,072.76
  4. Step 4: Simplify right side
    8,608.86x = 60,257,997.12
  5. Step 5: Solve for x
    x = 60,257,997.12/8,608.86
  6. Step 6: Final answer
    x = 6,999.53

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Half scale
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Double scale
Find fourth proportional to 8,609.86, 11,880.12 and 5,073.76
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.