Home / 21,156.60-31,736.24-7,115.52

Finding the Fourth Proportional to 21,156.60, 31,736.24 and 7,115.52

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Solution

The fourth proportional to 21,156.60, 31,736.24 and 7,115.52 is: 10,673.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,156.60 : 31,736.24 = 7,115.52 : x
  2. Step 2: Convert to fraction form
    21,156.60/31,736.24 = 7,115.52/x
  3. Step 3: Cross multiply
    21,156.60x = 31,736.24 × 7,115.52
  4. Step 4: Simplify right side
    21,156.60x = 225,819,850.44
  5. Step 5: Solve for x
    x = 225,819,850.44/21,156.60
  6. Step 6: Final answer
    x = 10,673.73

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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.