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Finding the Fourth Proportional to 11,138.94, 16,691.94 and 5,283.18

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Solution

The fourth proportional to 11,138.94, 16,691.94 and 5,283.18 is: 7,916.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,138.94 : 16,691.94 = 5,283.18 : x
  2. Step 2: Convert to fraction form
    11,138.94/16,691.94 = 5,283.18/x
  3. Step 3: Cross multiply
    11,138.94x = 16,691.94 × 5,283.18
  4. Step 4: Simplify right side
    11,138.94x = 88,186,523.57
  5. Step 5: Solve for x
    x = 88,186,523.57/11,138.94
  6. Step 6: Final answer
    x = 7,916.96

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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.