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Finding the Fourth Proportional to 7,809.92, 11,719.20 and 3,196.16

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Solution

The fourth proportional to 7,809.92, 11,719.20 and 3,196.16 is: 4,796.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,809.92 : 11,719.20 = 3,196.16 : x
  2. Step 2: Convert to fraction form
    7,809.92/11,719.20 = 3,196.16/x
  3. Step 3: Cross multiply
    7,809.92x = 11,719.20 × 3,196.16
  4. Step 4: Simplify right side
    7,809.92x = 37,456,438.27
  5. Step 5: Solve for x
    x = 37,456,438.27/7,809.92
  6. Step 6: Final answer
    x = 4,796.01

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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.