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Finding the Fourth Proportional to 7,765.44, 10,712.97 and 5,179.20

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Solution

The fourth proportional to 7,765.44, 10,712.97 and 5,179.20 is: 7,145.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,765.44 : 10,712.97 = 5,179.20 : x
  2. Step 2: Convert to fraction form
    7,765.44/10,712.97 = 5,179.20/x
  3. Step 3: Cross multiply
    7,765.44x = 10,712.97 × 5,179.20
  4. Step 4: Simplify right side
    7,765.44x = 55,484,614.22
  5. Step 5: Solve for x
    x = 55,484,614.22/7,765.44
  6. Step 6: Final answer
    x = 7,145.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.