Home / 21,121.52-31,723.32-15,552.88

Finding the Fourth Proportional to 21,121.52, 31,723.32 and 15,552.88

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Solution

The fourth proportional to 21,121.52, 31,723.32 and 15,552.88 is: 23,359.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,121.52 : 31,723.32 = 15,552.88 : x
  2. Step 2: Convert to fraction form
    21,121.52/31,723.32 = 15,552.88/x
  3. Step 3: Cross multiply
    21,121.52x = 31,723.32 × 15,552.88
  4. Step 4: Simplify right side
    21,121.52x = 493,388,989.16
  5. Step 5: Solve for x
    x = 493,388,989.16/21,121.52
  6. Step 6: Final answer
    x = 23,359.54

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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.