Home / 21,224.13-31,787.71-10,138.66

Finding the Fourth Proportional to 21,224.13, 31,787.71 and 10,138.66

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Solution

The fourth proportional to 21,224.13, 31,787.71 and 10,138.66 is: 15,184.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,224.13 : 31,787.71 = 10,138.66 : x
  2. Step 2: Convert to fraction form
    21,224.13/31,787.71 = 10,138.66/x
  3. Step 3: Cross multiply
    21,224.13x = 31,787.71 × 10,138.66
  4. Step 4: Simplify right side
    21,224.13x = 322,284,783.87
  5. Step 5: Solve for x
    x = 322,284,783.87/21,224.13
  6. Step 6: Final answer
    x = 15,184.83

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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.