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Finding the Fourth Proportional to 26,662.88, 39,990.24 and 9,128.68

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Solution

The fourth proportional to 26,662.88, 39,990.24 and 9,128.68 is: 13,691.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,662.88 : 39,990.24 = 9,128.68 : x
  2. Step 2: Convert to fraction form
    26,662.88/39,990.24 = 9,128.68/x
  3. Step 3: Cross multiply
    26,662.88x = 39,990.24 × 9,128.68
  4. Step 4: Simplify right side
    26,662.88x = 365,058,104.08
  5. Step 5: Solve for x
    x = 365,058,104.08/26,662.88
  6. Step 6: Final answer
    x = 13,691.62

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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.