Home / 12,229.40-18,343.80-3,909.29

Finding the Fourth Proportional to 12,229.40, 18,343.80 and 3,909.29

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Solution

The fourth proportional to 12,229.40, 18,343.80 and 3,909.29 is: 5,863.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,229.40 : 18,343.80 = 3,909.29 : x
  2. Step 2: Convert to fraction form
    12,229.40/18,343.80 = 3,909.29/x
  3. Step 3: Cross multiply
    12,229.40x = 18,343.80 × 3,909.29
  4. Step 4: Simplify right side
    12,229.40x = 71,711,142.18
  5. Step 5: Solve for x
    x = 71,711,142.18/12,229.40
  6. Step 6: Final answer
    x = 5,863.83

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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.