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Finding the Fourth Proportional to 39,859.56, 59,789.34 and 12,157.56

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Solution

The fourth proportional to 39,859.56, 59,789.34 and 12,157.56 is: 18,236.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,859.56 : 59,789.34 = 12,157.56 : x
  2. Step 2: Convert to fraction form
    39,859.56/59,789.34 = 12,157.56/x
  3. Step 3: Cross multiply
    39,859.56x = 59,789.34 × 12,157.56
  4. Step 4: Simplify right side
    39,859.56x = 726,892,488.41
  5. Step 5: Solve for x
    x = 726,892,488.41/39,859.56
  6. Step 6: Final answer
    x = 18,236.34

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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.