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Finding the Fourth Proportional to 7,909.80, 11,868.80 and 5,736.48

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Solution

The fourth proportional to 7,909.80, 11,868.80 and 5,736.48 is: 8,607.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,909.80 : 11,868.80 = 5,736.48 : x
  2. Step 2: Convert to fraction form
    7,909.80/11,868.80 = 5,736.48/x
  3. Step 3: Cross multiply
    7,909.80x = 11,868.80 × 5,736.48
  4. Step 4: Simplify right side
    7,909.80x = 68,085,105.14
  5. Step 5: Solve for x
    x = 68,085,105.14/7,909.80
  6. Step 6: Final answer
    x = 8,607.69

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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.