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Finding the Fourth Proportional to 12,230.80, 18,340.05 and 7,238.29

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Solution

The fourth proportional to 12,230.80, 18,340.05 and 7,238.29 is: 10,853.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,230.80 : 18,340.05 = 7,238.29 : x
  2. Step 2: Convert to fraction form
    12,230.80/18,340.05 = 7,238.29/x
  3. Step 3: Cross multiply
    12,230.80x = 18,340.05 × 7,238.29
  4. Step 4: Simplify right side
    12,230.80x = 132,750,503.54
  5. Step 5: Solve for x
    x = 132,750,503.54/12,230.80
  6. Step 6: Final answer
    x = 10,853.79

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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.