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Finding the Fourth Proportional to 12,221.66, 16,860.02 and 7,185.65

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Solution

The fourth proportional to 12,221.66, 16,860.02 and 7,185.65 is: 9,912.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,221.66 : 16,860.02 = 7,185.65 : x
  2. Step 2: Convert to fraction form
    12,221.66/16,860.02 = 7,185.65/x
  3. Step 3: Cross multiply
    12,221.66x = 16,860.02 × 7,185.65
  4. Step 4: Simplify right side
    12,221.66x = 121,150,082.48
  5. Step 5: Solve for x
    x = 121,150,082.48/12,221.66
  6. Step 6: Final answer
    x = 9,912.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.