Home / 20,921.93-31,378.26-6,131.99

Finding the Fourth Proportional to 20,921.93, 31,378.26 and 6,131.99

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Solution

The fourth proportional to 20,921.93, 31,378.26 and 6,131.99 is: 9,196.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,921.93 : 31,378.26 = 6,131.99 : x
  2. Step 2: Convert to fraction form
    20,921.93/31,378.26 = 6,131.99/x
  3. Step 3: Cross multiply
    20,921.93x = 31,378.26 × 6,131.99
  4. Step 4: Simplify right side
    20,921.93x = 192,411,176.54
  5. Step 5: Solve for x
    x = 192,411,176.54/20,921.93
  6. Step 6: Final answer
    x = 9,196.63

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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.