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Finding the Fourth Proportional to 26,223.88, 39,327.32 and 8,689

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Solution

The fourth proportional to 26,223.88, 39,327.32 and 8,689 is: 13,030.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,223.88 : 39,327.32 = 8,689 : x
  2. Step 2: Convert to fraction form
    26,223.88/39,327.32 = 8,689/x
  3. Step 3: Cross multiply
    26,223.88x = 39,327.32 × 8,689
  4. Step 4: Simplify right side
    26,223.88x = 341,715,040.04
  5. Step 5: Solve for x
    x = 341,715,040.04/26,223.88
  6. Step 6: Final answer
    x = 13,030.68

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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.