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Finding the Fourth Proportional to 26,661.66, 39,948.66 and 9,121.92

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Solution

The fourth proportional to 26,661.66, 39,948.66 and 9,121.92 is: 13,667.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,661.66 : 39,948.66 = 9,121.92 : x
  2. Step 2: Convert to fraction form
    26,661.66/39,948.66 = 9,121.92/x
  3. Step 3: Cross multiply
    26,661.66x = 39,948.66 × 9,121.92
  4. Step 4: Simplify right side
    26,661.66x = 364,408,480.63
  5. Step 5: Solve for x
    x = 364,408,480.63/26,661.66
  6. Step 6: Final answer
    x = 13,667.88

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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.