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Finding the Fourth Proportional to 12,221.54, 16,865.98 and 6,916.35

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Solution

The fourth proportional to 12,221.54, 16,865.98 and 6,916.35 is: 9,544.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,221.54 : 16,865.98 = 6,916.35 : x
  2. Step 2: Convert to fraction form
    12,221.54/16,865.98 = 6,916.35/x
  3. Step 3: Cross multiply
    12,221.54x = 16,865.98 × 6,916.35
  4. Step 4: Simplify right side
    12,221.54x = 116,651,066.73
  5. Step 5: Solve for x
    x = 116,651,066.73/12,221.54
  6. Step 6: Final answer
    x = 9,544.71

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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.