Home / 8,709.21-11,996.60-8,105.74

Finding the Fourth Proportional to 8,709.21, 11,996.60 and 8,105.74

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Solution

The fourth proportional to 8,709.21, 11,996.60 and 8,105.74 is: 11,165.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,709.21 : 11,996.60 = 8,105.74 : x
  2. Step 2: Convert to fraction form
    8,709.21/11,996.60 = 8,105.74/x
  3. Step 3: Cross multiply
    8,709.21x = 11,996.60 × 8,105.74
  4. Step 4: Simplify right side
    8,709.21x = 97,241,249.96
  5. Step 5: Solve for x
    x = 97,241,249.96/8,709.21
  6. Step 6: Final answer
    x = 11,165.34

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Half scale
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Double scale
Find fourth proportional to 8,710.21, 11,997.97 and 8,106.74
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.