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Finding the Fourth Proportional to 22,640.80, 34,129.24 and 21,104.80

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Solution

The fourth proportional to 22,640.80, 34,129.24 and 21,104.80 is: 31,813.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,640.80 : 34,129.24 = 21,104.80 : x
  2. Step 2: Convert to fraction form
    22,640.80/34,129.24 = 21,104.80/x
  3. Step 3: Cross multiply
    22,640.80x = 34,129.24 × 21,104.80
  4. Step 4: Simplify right side
    22,640.80x = 720,290,784.35
  5. Step 5: Solve for x
    x = 720,290,784.35/22,640.80
  6. Step 6: Final answer
    x = 31,813.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.