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Finding the Fourth Proportional to 39,608.20, 59,406.90 and 11,906.20

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Solution

The fourth proportional to 39,608.20, 59,406.90 and 11,906.20 is: 17,857.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,608.20 : 59,406.90 = 11,906.20 : x
  2. Step 2: Convert to fraction form
    39,608.20/59,406.90 = 11,906.20/x
  3. Step 3: Cross multiply
    39,608.20x = 59,406.90 × 11,906.20
  4. Step 4: Simplify right side
    39,608.20x = 707,310,432.78
  5. Step 5: Solve for x
    x = 707,310,432.78/39,608.20
  6. Step 6: Final answer
    x = 17,857.68

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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.