Home / 20,963.85-31,439.10-6,921.27

Finding the Fourth Proportional to 20,963.85, 31,439.10 and 6,921.27

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Solution

The fourth proportional to 20,963.85, 31,439.10 and 6,921.27 is: 10,379.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,963.85 : 31,439.10 = 6,921.27 : x
  2. Step 2: Convert to fraction form
    20,963.85/31,439.10 = 6,921.27/x
  3. Step 3: Cross multiply
    20,963.85x = 31,439.10 × 6,921.27
  4. Step 4: Simplify right side
    20,963.85x = 217,598,499.66
  5. Step 5: Solve for x
    x = 217,598,499.66/20,963.85
  6. Step 6: Final answer
    x = 10,379.70

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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.