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Finding the Fourth Proportional to 12,894.80, 19,344.20 and 5,499.24

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Solution

The fourth proportional to 12,894.80, 19,344.20 and 5,499.24 is: 8,249.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,894.80 : 19,344.20 = 5,499.24 : x
  2. Step 2: Convert to fraction form
    12,894.80/19,344.20 = 5,499.24/x
  3. Step 3: Cross multiply
    12,894.80x = 19,344.20 × 5,499.24
  4. Step 4: Simplify right side
    12,894.80x = 106,378,398.41
  5. Step 5: Solve for x
    x = 106,378,398.41/12,894.80
  6. Step 6: Final answer
    x = 8,249.71

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Double scale
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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.