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Finding the Fourth Proportional to 11,615.36, 16,004.16 and 7,882.88

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Solution

The fourth proportional to 11,615.36, 16,004.16 and 7,882.88 is: 10,861.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,615.36 : 16,004.16 = 7,882.88 : x
  2. Step 2: Convert to fraction form
    11,615.36/16,004.16 = 7,882.88/x
  3. Step 3: Cross multiply
    11,615.36x = 16,004.16 × 7,882.88
  4. Step 4: Simplify right side
    11,615.36x = 126,158,872.78
  5. Step 5: Solve for x
    x = 126,158,872.78/11,615.36
  6. Step 6: Final answer
    x = 10,861.38

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Half scale
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Double scale
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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.