Home / 21,971.56-32,942.70-11,415.64

Finding the Fourth Proportional to 21,971.56, 32,942.70 and 11,415.64

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Solution

The fourth proportional to 21,971.56, 32,942.70 and 11,415.64 is: 17,115.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,971.56 : 32,942.70 = 11,415.64 : x
  2. Step 2: Convert to fraction form
    21,971.56/32,942.70 = 11,415.64/x
  3. Step 3: Cross multiply
    21,971.56x = 32,942.70 × 11,415.64
  4. Step 4: Simplify right side
    21,971.56x = 376,062,003.83
  5. Step 5: Solve for x
    x = 376,062,003.83/21,971.56
  6. Step 6: Final answer
    x = 17,115.85

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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.