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Finding the Fourth Proportional to 7,662.80, 11,479.80 and 3,952.40

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Solution

The fourth proportional to 7,662.80, 11,479.80 and 3,952.40 is: 5,921.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,662.80 : 11,479.80 = 3,952.40 : x
  2. Step 2: Convert to fraction form
    7,662.80/11,479.80 = 3,952.40/x
  3. Step 3: Cross multiply
    7,662.80x = 11,479.80 × 3,952.40
  4. Step 4: Simplify right side
    7,662.80x = 45,372,761.52
  5. Step 5: Solve for x
    x = 45,372,761.52/7,662.80
  6. Step 6: Final answer
    x = 5,921.17

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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.