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Finding the Fourth Proportional to 7,887.15, 11,806.11 and 5,809.50

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Solution

The fourth proportional to 7,887.15, 11,806.11 and 5,809.50 is: 8,696.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,887.15 : 11,806.11 = 5,809.50 : x
  2. Step 2: Convert to fraction form
    7,887.15/11,806.11 = 5,809.50/x
  3. Step 3: Cross multiply
    7,887.15x = 11,806.11 × 5,809.50
  4. Step 4: Simplify right side
    7,887.15x = 68,587,596.05
  5. Step 5: Solve for x
    x = 68,587,596.05/7,887.15
  6. Step 6: Final answer
    x = 8,696.12

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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.