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Finding the Fourth Proportional to 28,640.98, 42,992.88 and 22,755.68

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Solution

The fourth proportional to 28,640.98, 42,992.88 and 22,755.68 is: 34,158.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,640.98 : 42,992.88 = 22,755.68 : x
  2. Step 2: Convert to fraction form
    28,640.98/42,992.88 = 22,755.68/x
  3. Step 3: Cross multiply
    28,640.98x = 42,992.88 × 22,755.68
  4. Step 4: Simplify right side
    28,640.98x = 978,332,327.04
  5. Step 5: Solve for x
    x = 978,332,327.04/28,640.98
  6. Step 6: Final answer
    x = 34,158.48

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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.