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Finding the Fourth Proportional to 8,138.79, 11,232.09 and 4,554.09

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Solution

The fourth proportional to 8,138.79, 11,232.09 and 4,554.09 is: 6,284.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,138.79 : 11,232.09 = 4,554.09 : x
  2. Step 2: Convert to fraction form
    8,138.79/11,232.09 = 4,554.09/x
  3. Step 3: Cross multiply
    8,138.79x = 11,232.09 × 4,554.09
  4. Step 4: Simplify right side
    8,138.79x = 51,151,912.25
  5. Step 5: Solve for x
    x = 51,151,912.25/8,138.79
  6. Step 6: Final answer
    x = 6,284.95

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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.