Home / 20,963.27-31,431.94-9,872.75

Finding the Fourth Proportional to 20,963.27, 31,431.94 and 9,872.75

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Solution

The fourth proportional to 20,963.27, 31,431.94 and 9,872.75 is: 14,803.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,963.27 : 31,431.94 = 9,872.75 : x
  2. Step 2: Convert to fraction form
    20,963.27/31,431.94 = 9,872.75/x
  3. Step 3: Cross multiply
    20,963.27x = 31,431.94 × 9,872.75
  4. Step 4: Simplify right side
    20,963.27x = 310,319,739.53
  5. Step 5: Solve for x
    x = 310,319,739.53/20,963.27
  6. Step 6: Final answer
    x = 14,803.02

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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.