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Finding the Fourth Proportional to 11,980.95, 16,517.58 and 8,391.08

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Solution

The fourth proportional to 11,980.95, 16,517.58 and 8,391.08 is: 11,568.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,980.95 : 16,517.58 = 8,391.08 : x
  2. Step 2: Convert to fraction form
    11,980.95/16,517.58 = 8,391.08/x
  3. Step 3: Cross multiply
    11,980.95x = 16,517.58 × 8,391.08
  4. Step 4: Simplify right side
    11,980.95x = 138,600,335.19
  5. Step 5: Solve for x
    x = 138,600,335.19/11,980.95
  6. Step 6: Final answer
    x = 11,568.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.