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Finding the Fourth Proportional to 12,694.61, 17,515.08 and 7,388.70

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Solution

The fourth proportional to 12,694.61, 17,515.08 and 7,388.70 is: 10,194.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,694.61 : 17,515.08 = 7,388.70 : x
  2. Step 2: Convert to fraction form
    12,694.61/17,515.08 = 7,388.70/x
  3. Step 3: Cross multiply
    12,694.61x = 17,515.08 × 7,388.70
  4. Step 4: Simplify right side
    12,694.61x = 129,413,671.60
  5. Step 5: Solve for x
    x = 129,413,671.60/12,694.61
  6. Step 6: Final answer
    x = 10,194.38

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Half scale
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Double scale
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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.