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Finding the Fourth Proportional to 12,614.80, 18,922.20 and 5,211.12

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Solution

The fourth proportional to 12,614.80, 18,922.20 and 5,211.12 is: 7,816.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,614.80 : 18,922.20 = 5,211.12 : x
  2. Step 2: Convert to fraction form
    12,614.80/18,922.20 = 5,211.12/x
  3. Step 3: Cross multiply
    12,614.80x = 18,922.20 × 5,211.12
  4. Step 4: Simplify right side
    12,614.80x = 98,605,854.86
  5. Step 5: Solve for x
    x = 98,605,854.86/12,614.80
  6. Step 6: Final answer
    x = 7,816.68

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Similar ratio
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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.