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Finding the Fourth Proportional to 26,615.39, 39,916.26 and 7,891.05

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Solution

The fourth proportional to 26,615.39, 39,916.26 and 7,891.05 is: 11,834.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,615.39 : 39,916.26 = 7,891.05 : x
  2. Step 2: Convert to fraction form
    26,615.39/39,916.26 = 7,891.05/x
  3. Step 3: Cross multiply
    26,615.39x = 39,916.26 × 7,891.05
  4. Step 4: Simplify right side
    26,615.39x = 314,981,203.47
  5. Step 5: Solve for x
    x = 314,981,203.47/26,615.39
  6. Step 6: Final answer
    x = 11,834.55

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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.