Home / 12,489.78-17,236.32-8,244.56

Finding the Fourth Proportional to 12,489.78, 17,236.32 and 8,244.56

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Solution

The fourth proportional to 12,489.78, 17,236.32 and 8,244.56 is: 11,377.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,489.78 : 17,236.32 = 8,244.56 : x
  2. Step 2: Convert to fraction form
    12,489.78/17,236.32 = 8,244.56/x
  3. Step 3: Cross multiply
    12,489.78x = 17,236.32 × 8,244.56
  4. Step 4: Simplify right side
    12,489.78x = 142,105,874.42
  5. Step 5: Solve for x
    x = 142,105,874.42/12,489.78
  6. Step 6: Final answer
    x = 11,377.77

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Half scale
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Double scale
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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.