Home / 26,639.68-39,961.32-9,121.78

Finding the Fourth Proportional to 26,639.68, 39,961.32 and 9,121.78

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Solution

The fourth proportional to 26,639.68, 39,961.32 and 9,121.78 is: 13,683.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,639.68 : 39,961.32 = 9,121.78 : x
  2. Step 2: Convert to fraction form
    26,639.68/39,961.32 = 9,121.78/x
  3. Step 3: Cross multiply
    26,639.68x = 39,961.32 × 9,121.78
  4. Step 4: Simplify right side
    26,639.68x = 364,518,369.55
  5. Step 5: Solve for x
    x = 364,518,369.55/26,639.68
  6. Step 6: Final answer
    x = 13,683.29

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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.