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Finding the Fourth Proportional to 7,986.66, 11,980.50 and 2,440.20

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Solution

The fourth proportional to 7,986.66, 11,980.50 and 2,440.20 is: 3,660.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,986.66 : 11,980.50 = 2,440.20 : x
  2. Step 2: Convert to fraction form
    7,986.66/11,980.50 = 2,440.20/x
  3. Step 3: Cross multiply
    7,986.66x = 11,980.50 × 2,440.20
  4. Step 4: Simplify right side
    7,986.66x = 29,234,816.10
  5. Step 5: Solve for x
    x = 29,234,816.10/7,986.66
  6. Step 6: Final answer
    x = 3,660.46

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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.