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Finding the Fourth Proportional to 12,897.92, 17,781.60 and 9,664.96

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Solution

The fourth proportional to 12,897.92, 17,781.60 and 9,664.96 is: 13,324.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,897.92 : 17,781.60 = 9,664.96 : x
  2. Step 2: Convert to fraction form
    12,897.92/17,781.60 = 9,664.96/x
  3. Step 3: Cross multiply
    12,897.92x = 17,781.60 × 9,664.96
  4. Step 4: Simplify right side
    12,897.92x = 171,858,452.74
  5. Step 5: Solve for x
    x = 171,858,452.74/12,897.92
  6. Step 6: Final answer
    x = 13,324.51

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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.