Home / 21,219.92-31,781.42-10,134.41

Finding the Fourth Proportional to 21,219.92, 31,781.42 and 10,134.41

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Solution

The fourth proportional to 21,219.92, 31,781.42 and 10,134.41 is: 15,178.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,219.92 : 31,781.42 = 10,134.41 : x
  2. Step 2: Convert to fraction form
    21,219.92/31,781.42 = 10,134.41/x
  3. Step 3: Cross multiply
    21,219.92x = 31,781.42 × 10,134.41
  4. Step 4: Simplify right side
    21,219.92x = 322,085,940.66
  5. Step 5: Solve for x
    x = 322,085,940.66/21,219.92
  6. Step 6: Final answer
    x = 15,178.47

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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.