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Finding the Fourth Proportional to 7,910.75, 11,859.14 and 2,980.62

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Solution

The fourth proportional to 7,910.75, 11,859.14 and 2,980.62 is: 4,468.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,910.75 : 11,859.14 = 2,980.62 : x
  2. Step 2: Convert to fraction form
    7,910.75/11,859.14 = 2,980.62/x
  3. Step 3: Cross multiply
    7,910.75x = 11,859.14 × 2,980.62
  4. Step 4: Simplify right side
    7,910.75x = 35,347,597.32
  5. Step 5: Solve for x
    x = 35,347,597.32/7,910.75
  6. Step 6: Final answer
    x = 4,468.30

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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.