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Finding the Fourth Proportional to 26,615.90, 39,917.03 and 7,891.56

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Solution

The fourth proportional to 26,615.90, 39,917.03 and 7,891.56 is: 11,835.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,615.90 : 39,917.03 = 7,891.56 : x
  2. Step 2: Convert to fraction form
    26,615.90/39,917.03 = 7,891.56/x
  3. Step 3: Cross multiply
    26,615.90x = 39,917.03 × 7,891.56
  4. Step 4: Simplify right side
    26,615.90x = 315,007,637.27
  5. Step 5: Solve for x
    x = 315,007,637.27/26,615.90
  6. Step 6: Final answer
    x = 11,835.32

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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.