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Finding the Fourth Proportional to 8,191.79, 12,288.90 and 2,644.10

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Solution

The fourth proportional to 8,191.79, 12,288.90 and 2,644.10 is: 3,966.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,191.79 : 12,288.90 = 2,644.10 : x
  2. Step 2: Convert to fraction form
    8,191.79/12,288.90 = 2,644.10/x
  3. Step 3: Cross multiply
    8,191.79x = 12,288.90 × 2,644.10
  4. Step 4: Simplify right side
    8,191.79x = 32,493,080.49
  5. Step 5: Solve for x
    x = 32,493,080.49/8,191.79
  6. Step 6: Final answer
    x = 3,966.54

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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.