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Finding the Fourth Proportional to 29,679.80, 44,480.82 and 12,129.62

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Solution

The fourth proportional to 29,679.80, 44,480.82 and 12,129.62 is: 18,178.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,679.80 : 44,480.82 = 12,129.62 : x
  2. Step 2: Convert to fraction form
    29,679.80/44,480.82 = 12,129.62/x
  3. Step 3: Cross multiply
    29,679.80x = 44,480.82 × 12,129.62
  4. Step 4: Simplify right side
    29,679.80x = 539,535,443.89
  5. Step 5: Solve for x
    x = 539,535,443.89/29,679.80
  6. Step 6: Final answer
    x = 18,178.54

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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.