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Finding the Fourth Proportional to 26,661.15, 39,978.34 and 8,885.56

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Solution

The fourth proportional to 26,661.15, 39,978.34 and 8,885.56 is: 13,323.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,661.15 : 39,978.34 = 8,885.56 : x
  2. Step 2: Convert to fraction form
    26,661.15/39,978.34 = 8,885.56/x
  3. Step 3: Cross multiply
    26,661.15x = 39,978.34 × 8,885.56
  4. Step 4: Simplify right side
    26,661.15x = 355,229,938.77
  5. Step 5: Solve for x
    x = 355,229,938.77/26,661.15
  6. Step 6: Final answer
    x = 13,323.88

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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.