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Finding the Fourth Proportional to 11,181.76, 15,431.56 and 6,213.76

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Solution

The fourth proportional to 11,181.76, 15,431.56 and 6,213.76 is: 8,575.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,181.76 : 15,431.56 = 6,213.76 : x
  2. Step 2: Convert to fraction form
    11,181.76/15,431.56 = 6,213.76/x
  3. Step 3: Cross multiply
    11,181.76x = 15,431.56 × 6,213.76
  4. Step 4: Simplify right side
    11,181.76x = 95,888,010.27
  5. Step 5: Solve for x
    x = 95,888,010.27/11,181.76
  6. Step 6: Final answer
    x = 8,575.40

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Half scale
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Double scale
Find fourth proportional to 11,182.76, 15,432.94 and 6,214.76
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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.