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Finding the Fourth Proportional to 12,278.84, 16,944.81 and 6,689.84

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Solution

The fourth proportional to 12,278.84, 16,944.81 and 6,689.84 is: 9,231.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,278.84 : 16,944.81 = 6,689.84 : x
  2. Step 2: Convert to fraction form
    12,278.84/16,944.81 = 6,689.84/x
  3. Step 3: Cross multiply
    12,278.84x = 16,944.81 × 6,689.84
  4. Step 4: Simplify right side
    12,278.84x = 113,358,067.73
  5. Step 5: Solve for x
    x = 113,358,067.73/12,278.84
  6. Step 6: Final answer
    x = 9,231.99

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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.