Home / 20,963.94-31,439.22-6,921.34

Finding the Fourth Proportional to 20,963.94, 31,439.22 and 6,921.34

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Solution

The fourth proportional to 20,963.94, 31,439.22 and 6,921.34 is: 10,379.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,963.94 : 31,439.22 = 6,921.34 : x
  2. Step 2: Convert to fraction form
    20,963.94/31,439.22 = 6,921.34/x
  3. Step 3: Cross multiply
    20,963.94x = 31,439.22 × 6,921.34
  4. Step 4: Simplify right side
    20,963.94x = 217,601,530.95
  5. Step 5: Solve for x
    x = 217,601,530.95/20,963.94
  6. Step 6: Final answer
    x = 10,379.80

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1.5x scale

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.