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Finding the Fourth Proportional to 26,640.94, 39,951.02 and 9,991.90

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Solution

The fourth proportional to 26,640.94, 39,951.02 and 9,991.90 is: 14,983.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,640.94 : 39,951.02 = 9,991.90 : x
  2. Step 2: Convert to fraction form
    26,640.94/39,951.02 = 9,991.90/x
  3. Step 3: Cross multiply
    26,640.94x = 39,951.02 × 9,991.90
  4. Step 4: Simplify right side
    26,640.94x = 399,186,596.74
  5. Step 5: Solve for x
    x = 399,186,596.74/26,640.94
  6. Step 6: Final answer
    x = 14,983.95

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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.