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Finding the Fourth Proportional to 26,639.58, 39,960.81 and 6,917.61

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Solution

The fourth proportional to 26,639.58, 39,960.81 and 6,917.61 is: 10,376.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,639.58 : 39,960.81 = 6,917.61 : x
  2. Step 2: Convert to fraction form
    26,639.58/39,960.81 = 6,917.61/x
  3. Step 3: Cross multiply
    26,639.58x = 39,960.81 × 6,917.61
  4. Step 4: Simplify right side
    26,639.58x = 276,433,298.86
  5. Step 5: Solve for x
    x = 276,433,298.86/26,639.58
  6. Step 6: Final answer
    x = 10,376.79

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1.5x scale

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.