Home / 20,896.79-31,356.11-8,419.95

Finding the Fourth Proportional to 20,896.79, 31,356.11 and 8,419.95

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Solution

The fourth proportional to 20,896.79, 31,356.11 and 8,419.95 is: 12,634.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,896.79 : 31,356.11 = 8,419.95 : x
  2. Step 2: Convert to fraction form
    20,896.79/31,356.11 = 8,419.95/x
  3. Step 3: Cross multiply
    20,896.79x = 31,356.11 × 8,419.95
  4. Step 4: Simplify right side
    20,896.79x = 264,016,899.44
  5. Step 5: Solve for x
    x = 264,016,899.44/20,896.79
  6. Step 6: Final answer
    x = 12,634.33

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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.