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Finding the Fourth Proportional to 9,911.15, 14,866.87 and 2,891.18

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Solution

The fourth proportional to 9,911.15, 14,866.87 and 2,891.18 is: 4,336.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,911.15 : 14,866.87 = 2,891.18 : x
  2. Step 2: Convert to fraction form
    9,911.15/14,866.87 = 2,891.18/x
  3. Step 3: Cross multiply
    9,911.15x = 14,866.87 × 2,891.18
  4. Step 4: Simplify right side
    9,911.15x = 42,982,797.21
  5. Step 5: Solve for x
    x = 42,982,797.21/9,911.15
  6. Step 6: Final answer
    x = 4,336.81

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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.