Home / 31,320-43,244.28-20,161.44

Finding the Fourth Proportional to 31,320, 43,244.28 and 20,161.44

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Solution

The fourth proportional to 31,320, 43,244.28 and 20,161.44 is: 27,837.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,320 : 43,244.28 = 20,161.44 : x
  2. Step 2: Convert to fraction form
    31,320/43,244.28 = 20,161.44/x
  3. Step 3: Cross multiply
    31,320x = 43,244.28 × 20,161.44
  4. Step 4: Simplify right side
    31,320x = 871,866,956.56
  5. Step 5: Solve for x
    x = 871,866,956.56/31,320
  6. Step 6: Final answer
    x = 27,837.39

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.