Home / 22,550.40-31,121.94-12,990.69

Finding the Fourth Proportional to 22,550.40, 31,121.94 and 12,990.69

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Solution

The fourth proportional to 22,550.40, 31,121.94 and 12,990.69 is: 17,928.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,550.40 : 31,121.94 = 12,990.69 : x
  2. Step 2: Convert to fraction form
    22,550.40/31,121.94 = 12,990.69/x
  3. Step 3: Cross multiply
    22,550.40x = 31,121.94 × 12,990.69
  4. Step 4: Simplify right side
    22,550.40x = 404,295,474.74
  5. Step 5: Solve for x
    x = 404,295,474.74/22,550.40
  6. Step 6: Final answer
    x = 17,928.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.