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Finding the Fourth Proportional to 26,640.60, 39,960.90 and 6,917.50

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Solution

The fourth proportional to 26,640.60, 39,960.90 and 6,917.50 is: 10,376.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,640.60 : 39,960.90 = 6,917.50 : x
  2. Step 2: Convert to fraction form
    26,640.60/39,960.90 = 6,917.50/x
  3. Step 3: Cross multiply
    26,640.60x = 39,960.90 × 6,917.50
  4. Step 4: Simplify right side
    26,640.60x = 276,429,525.75
  5. Step 5: Solve for x
    x = 276,429,525.75/26,640.60
  6. Step 6: Final answer
    x = 10,376.25

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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.