Home / 20,912.97-31,385.07-13,026.99

Finding the Fourth Proportional to 20,912.97, 31,385.07 and 13,026.99

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Solution

The fourth proportional to 20,912.97, 31,385.07 and 13,026.99 is: 19,550.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,912.97 : 31,385.07 = 13,026.99 : x
  2. Step 2: Convert to fraction form
    20,912.97/31,385.07 = 13,026.99/x
  3. Step 3: Cross multiply
    20,912.97x = 31,385.07 × 13,026.99
  4. Step 4: Simplify right side
    20,912.97x = 408,852,993.04
  5. Step 5: Solve for x
    x = 408,852,993.04/20,912.97
  6. Step 6: Final answer
    x = 19,550.21

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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.