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Finding the Fourth Proportional to 7,805.31, 11,707.98 and 1,961.92

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Solution

The fourth proportional to 7,805.31, 11,707.98 and 1,961.92 is: 2,942.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,805.31 : 11,707.98 = 1,961.92 : x
  2. Step 2: Convert to fraction form
    7,805.31/11,707.98 = 1,961.92/x
  3. Step 3: Cross multiply
    7,805.31x = 11,707.98 × 1,961.92
  4. Step 4: Simplify right side
    7,805.31x = 22,970,127.40
  5. Step 5: Solve for x
    x = 22,970,127.40/7,805.31
  6. Step 6: Final answer
    x = 2,942.88

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Similar ratio
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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.