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Finding the Fourth Proportional to 11,991.15, 16,538.94 and 7,950.66

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Solution

The fourth proportional to 11,991.15, 16,538.94 and 7,950.66 is: 10,966.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,991.15 : 16,538.94 = 7,950.66 : x
  2. Step 2: Convert to fraction form
    11,991.15/16,538.94 = 7,950.66/x
  3. Step 3: Cross multiply
    11,991.15x = 16,538.94 × 7,950.66
  4. Step 4: Simplify right side
    11,991.15x = 131,495,488.70
  5. Step 5: Solve for x
    x = 131,495,488.70/11,991.15
  6. Step 6: Final answer
    x = 10,966.04

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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.