Home / 20,522.67-28,321.20-11,091.21

Finding the Fourth Proportional to 20,522.67, 28,321.20 and 11,091.21

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Solution

The fourth proportional to 20,522.67, 28,321.20 and 11,091.21 is: 15,305.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,522.67 : 28,321.20 = 11,091.21 : x
  2. Step 2: Convert to fraction form
    20,522.67/28,321.20 = 11,091.21/x
  3. Step 3: Cross multiply
    20,522.67x = 28,321.20 × 11,091.21
  4. Step 4: Simplify right side
    20,522.67x = 314,116,376.65
  5. Step 5: Solve for x
    x = 314,116,376.65/20,522.67
  6. Step 6: Final answer
    x = 15,305.82

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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.