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Finding the Fourth Proportional to 8,145.75, 12,218.63 and 2,951.63

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Solution

The fourth proportional to 8,145.75, 12,218.63 and 2,951.63 is: 4,427.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,145.75 : 12,218.63 = 2,951.63 : x
  2. Step 2: Convert to fraction form
    8,145.75/12,218.63 = 2,951.63/x
  3. Step 3: Cross multiply
    8,145.75x = 12,218.63 × 2,951.63
  4. Step 4: Simplify right side
    8,145.75x = 36,064,799.02
  5. Step 5: Solve for x
    x = 36,064,799.02/8,145.75
  6. Step 6: Final answer
    x = 4,427.44

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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.