Home / 20,981.25-31,474.31-6,943.14

Finding the Fourth Proportional to 20,981.25, 31,474.31 and 6,943.14

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Solution

The fourth proportional to 20,981.25, 31,474.31 and 6,943.14 is: 10,415.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,981.25 : 31,474.31 = 6,943.14 : x
  2. Step 2: Convert to fraction form
    20,981.25/31,474.31 = 6,943.14/x
  3. Step 3: Cross multiply
    20,981.25x = 31,474.31 × 6,943.14
  4. Step 4: Simplify right side
    20,981.25x = 218,530,506.02
  5. Step 5: Solve for x
    x = 218,530,506.02/20,981.25
  6. Step 6: Final answer
    x = 10,415.51

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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.