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Finding the Fourth Proportional to 12,221.94, 16,863.72 and 6,918.06

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Solution

The fourth proportional to 12,221.94, 16,863.72 and 6,918.06 is: 9,545.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,221.94 : 16,863.72 = 6,918.06 : x
  2. Step 2: Convert to fraction form
    12,221.94/16,863.72 = 6,918.06/x
  3. Step 3: Cross multiply
    12,221.94x = 16,863.72 × 6,918.06
  4. Step 4: Simplify right side
    12,221.94x = 116,664,226.78
  5. Step 5: Solve for x
    x = 116,664,226.78/12,221.94
  6. Step 6: Final answer
    x = 9,545.48

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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.