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Finding the Fourth Proportional to 7,660.72, 11,480.28 and 3,490.48

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Solution

The fourth proportional to 7,660.72, 11,480.28 and 3,490.48 is: 5,230.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,660.72 : 11,480.28 = 3,490.48 : x
  2. Step 2: Convert to fraction form
    7,660.72/11,480.28 = 3,490.48/x
  3. Step 3: Cross multiply
    7,660.72x = 11,480.28 × 3,490.48
  4. Step 4: Simplify right side
    7,660.72x = 40,071,687.73
  5. Step 5: Solve for x
    x = 40,071,687.73/7,660.72
  6. Step 6: Final answer
    x = 5,230.80

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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.