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Finding the Fourth Proportional to 9,279.75, 12,806.10 and 5,553.75

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Solution

The fourth proportional to 9,279.75, 12,806.10 and 5,553.75 is: 7,664.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,279.75 : 12,806.10 = 5,553.75 : x
  2. Step 2: Convert to fraction form
    9,279.75/12,806.10 = 5,553.75/x
  3. Step 3: Cross multiply
    9,279.75x = 12,806.10 × 5,553.75
  4. Step 4: Simplify right side
    9,279.75x = 71,121,877.88
  5. Step 5: Solve for x
    x = 71,121,877.88/9,279.75
  6. Step 6: Final answer
    x = 7,664.20

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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.