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Finding the Fourth Proportional to 8,119.19, 12,178.80 and 1,963.19

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Solution

The fourth proportional to 8,119.19, 12,178.80 and 1,963.19 is: 2,944.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,119.19 : 12,178.80 = 1,963.19 : x
  2. Step 2: Convert to fraction form
    8,119.19/12,178.80 = 1,963.19/x
  3. Step 3: Cross multiply
    8,119.19x = 12,178.80 × 1,963.19
  4. Step 4: Simplify right side
    8,119.19x = 23,909,328.82
  5. Step 5: Solve for x
    x = 23,909,328.82/8,119.19
  6. Step 6: Final answer
    x = 2,944.79

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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.