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Finding the Fourth Proportional to 11,866.56, 16,375.95 and 6,561.47

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Solution

The fourth proportional to 11,866.56, 16,375.95 and 6,561.47 is: 9,054.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,866.56 : 16,375.95 = 6,561.47 : x
  2. Step 2: Convert to fraction form
    11,866.56/16,375.95 = 6,561.47/x
  3. Step 3: Cross multiply
    11,866.56x = 16,375.95 × 6,561.47
  4. Step 4: Simplify right side
    11,866.56x = 107,450,222.77
  5. Step 5: Solve for x
    x = 107,450,222.77/11,866.56
  6. Step 6: Final answer
    x = 9,054.88

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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.