Home / 11,115.76-16,681.84-5,272.38

Finding the Fourth Proportional to 11,115.76, 16,681.84 and 5,272.38

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Solution

The fourth proportional to 11,115.76, 16,681.84 and 5,272.38 is: 7,912.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,115.76 : 16,681.84 = 5,272.38 : x
  2. Step 2: Convert to fraction form
    11,115.76/16,681.84 = 5,272.38/x
  3. Step 3: Cross multiply
    11,115.76x = 16,681.84 × 5,272.38
  4. Step 4: Simplify right side
    11,115.76x = 87,952,999.58
  5. Step 5: Solve for x
    x = 87,952,999.58/11,115.76
  6. Step 6: Final answer
    x = 7,912.46

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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.