Home / 11,891.72-17,821.16-8,966.81

Finding the Fourth Proportional to 11,891.72, 17,821.16 and 8,966.81

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Solution

The fourth proportional to 11,891.72, 17,821.16 and 8,966.81 is: 13,437.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,891.72 : 17,821.16 = 8,966.81 : x
  2. Step 2: Convert to fraction form
    11,891.72/17,821.16 = 8,966.81/x
  3. Step 3: Cross multiply
    11,891.72x = 17,821.16 × 8,966.81
  4. Step 4: Simplify right side
    11,891.72x = 159,798,866.59
  5. Step 5: Solve for x
    x = 159,798,866.59/11,891.72
  6. Step 6: Final answer
    x = 13,437.83

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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.