Home / 20,921.43-31,377.51-6,131.49

Finding the Fourth Proportional to 20,921.43, 31,377.51 and 6,131.49

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Solution

The fourth proportional to 20,921.43, 31,377.51 and 6,131.49 is: 9,195.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,921.43 : 31,377.51 = 6,131.49 : x
  2. Step 2: Convert to fraction form
    20,921.43/31,377.51 = 6,131.49/x
  3. Step 3: Cross multiply
    20,921.43x = 31,377.51 × 6,131.49
  4. Step 4: Simplify right side
    20,921.43x = 192,390,888.79
  5. Step 5: Solve for x
    x = 192,390,888.79/20,921.43
  6. Step 6: Final answer
    x = 9,195.88

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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.