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Finding the Fourth Proportional to 12,221.80, 18,329.03 and 6,375.22

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Solution

The fourth proportional to 12,221.80, 18,329.03 and 6,375.22 is: 9,560.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,221.80 : 18,329.03 = 6,375.22 : x
  2. Step 2: Convert to fraction form
    12,221.80/18,329.03 = 6,375.22/x
  3. Step 3: Cross multiply
    12,221.80x = 18,329.03 × 6,375.22
  4. Step 4: Simplify right side
    12,221.80x = 116,851,475.12
  5. Step 5: Solve for x
    x = 116,851,475.12/12,221.80
  6. Step 6: Final answer
    x = 9,560.91

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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.