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Finding the Fourth Proportional to 7,986.77, 11,980.23 and 2,792.66

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Solution

The fourth proportional to 7,986.77, 11,980.23 and 2,792.66 is: 4,189.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,986.77 : 11,980.23 = 2,792.66 : x
  2. Step 2: Convert to fraction form
    7,986.77/11,980.23 = 2,792.66/x
  3. Step 3: Cross multiply
    7,986.77x = 11,980.23 × 2,792.66
  4. Step 4: Simplify right side
    7,986.77x = 33,456,709.11
  5. Step 5: Solve for x
    x = 33,456,709.11/7,986.77
  6. Step 6: Final answer
    x = 4,189.02

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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.