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Finding the Fourth Proportional to 12,477.60, 18,716.40 and 8,249.40

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Solution

The fourth proportional to 12,477.60, 18,716.40 and 8,249.40 is: 12,374.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,477.60 : 18,716.40 = 8,249.40 : x
  2. Step 2: Convert to fraction form
    12,477.60/18,716.40 = 8,249.40/x
  3. Step 3: Cross multiply
    12,477.60x = 18,716.40 × 8,249.40
  4. Step 4: Simplify right side
    12,477.60x = 154,399,070.16
  5. Step 5: Solve for x
    x = 154,399,070.16/12,477.60
  6. Step 6: Final answer
    x = 12,374.10

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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.