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Finding the Fourth Proportional to 26,999.40, 40,486.95 and 12,200.70

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Solution

The fourth proportional to 26,999.40, 40,486.95 and 12,200.70 is: 18,295.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,999.40 : 40,486.95 = 12,200.70 : x
  2. Step 2: Convert to fraction form
    26,999.40/40,486.95 = 12,200.70/x
  3. Step 3: Cross multiply
    26,999.40x = 40,486.95 × 12,200.70
  4. Step 4: Simplify right side
    26,999.40x = 493,969,130.87
  5. Step 5: Solve for x
    x = 493,969,130.87/26,999.40
  6. Step 6: Final answer
    x = 18,295.56

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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.