Home / 20,669.28-31,025.76-12,883.44

Finding the Fourth Proportional to 20,669.28, 31,025.76 and 12,883.44

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Solution

The fourth proportional to 20,669.28, 31,025.76 and 12,883.44 is: 19,338.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,669.28 : 31,025.76 = 12,883.44 : x
  2. Step 2: Convert to fraction form
    20,669.28/31,025.76 = 12,883.44/x
  3. Step 3: Cross multiply
    20,669.28x = 31,025.76 × 12,883.44
  4. Step 4: Simplify right side
    20,669.28x = 399,718,517.41
  5. Step 5: Solve for x
    x = 399,718,517.41/20,669.28
  6. Step 6: Final answer
    x = 19,338.77

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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.