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Finding the Fourth Proportional to 26,620.62, 39,939.24 and 7,900.74

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Solution

The fourth proportional to 26,620.62, 39,939.24 and 7,900.74 is: 11,853.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,620.62 : 39,939.24 = 7,900.74 : x
  2. Step 2: Convert to fraction form
    26,620.62/39,939.24 = 7,900.74/x
  3. Step 3: Cross multiply
    26,620.62x = 39,939.24 × 7,900.74
  4. Step 4: Simplify right side
    26,620.62x = 315,549,551.04
  5. Step 5: Solve for x
    x = 315,549,551.04/26,620.62
  6. Step 6: Final answer
    x = 11,853.58

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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.