Home / 20,922.21-28,859.09-13,370.85

Finding the Fourth Proportional to 20,922.21, 28,859.09 and 13,370.85

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Solution

The fourth proportional to 20,922.21, 28,859.09 and 13,370.85 is: 18,443.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,922.21 : 28,859.09 = 13,370.85 : x
  2. Step 2: Convert to fraction form
    20,922.21/28,859.09 = 13,370.85/x
  3. Step 3: Cross multiply
    20,922.21x = 28,859.09 × 13,370.85
  4. Step 4: Simplify right side
    20,922.21x = 385,870,496.67
  5. Step 5: Solve for x
    x = 385,870,496.67/20,922.21
  6. Step 6: Final answer
    x = 18,443.10

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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.