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Finding the Fourth Proportional to 7,986.78, 11,980.17 and 3,599.11

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Solution

The fourth proportional to 7,986.78, 11,980.17 and 3,599.11 is: 5,398.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,986.78 : 11,980.17 = 3,599.11 : x
  2. Step 2: Convert to fraction form
    7,986.78/11,980.17 = 3,599.11/x
  3. Step 3: Cross multiply
    7,986.78x = 11,980.17 × 3,599.11
  4. Step 4: Simplify right side
    7,986.78x = 43,117,871.75
  5. Step 5: Solve for x
    x = 43,117,871.75/7,986.78
  6. Step 6: Final answer
    x = 5,398.66

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Double scale
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Similar ratio
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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.