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Finding the Fourth Proportional to 17,187.84, 25,781.76 and 7,960.32

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Solution

The fourth proportional to 17,187.84, 25,781.76 and 7,960.32 is: 11,940.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,187.84 : 25,781.76 = 7,960.32 : x
  2. Step 2: Convert to fraction form
    17,187.84/25,781.76 = 7,960.32/x
  3. Step 3: Cross multiply
    17,187.84x = 25,781.76 × 7,960.32
  4. Step 4: Simplify right side
    17,187.84x = 205,231,059.76
  5. Step 5: Solve for x
    x = 205,231,059.76/17,187.84
  6. Step 6: Final answer
    x = 11,940.48

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.