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Finding the Fourth Proportional to 11,008.60, 16,512.90 and 3,111.10

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Solution

The fourth proportional to 11,008.60, 16,512.90 and 3,111.10 is: 4,666.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,008.60 : 16,512.90 = 3,111.10 : x
  2. Step 2: Convert to fraction form
    11,008.60/16,512.90 = 3,111.10/x
  3. Step 3: Cross multiply
    11,008.60x = 16,512.90 × 3,111.10
  4. Step 4: Simplify right side
    11,008.60x = 51,373,283.19
  5. Step 5: Solve for x
    x = 51,373,283.19/11,008.60
  6. Step 6: Final answer
    x = 4,666.65

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.