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Finding the Fourth Proportional to 12,160.42, 16,781.42 and 6,855.32

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Solution

The fourth proportional to 12,160.42, 16,781.42 and 6,855.32 is: 9,460.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,160.42 : 16,781.42 = 6,855.32 : x
  2. Step 2: Convert to fraction form
    12,160.42/16,781.42 = 6,855.32/x
  3. Step 3: Cross multiply
    12,160.42x = 16,781.42 × 6,855.32
  4. Step 4: Simplify right side
    12,160.42x = 115,042,063.25
  5. Step 5: Solve for x
    x = 115,042,063.25/12,160.42
  6. Step 6: Final answer
    x = 9,460.37

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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.