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Finding the Fourth Proportional to 12,696.35, 17,515.15 and 8,221.54

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Solution

The fourth proportional to 12,696.35, 17,515.15 and 8,221.54 is: 11,341.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,696.35 : 17,515.15 = 8,221.54 : x
  2. Step 2: Convert to fraction form
    12,696.35/17,515.15 = 8,221.54/x
  3. Step 3: Cross multiply
    12,696.35x = 17,515.15 × 8,221.54
  4. Step 4: Simplify right side
    12,696.35x = 144,001,512.53
  5. Step 5: Solve for x
    x = 144,001,512.53/12,696.35
  6. Step 6: Final answer
    x = 11,341.96

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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.