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Finding the Fourth Proportional to 12,079.44, 18,118.92 and 5,919.12

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Solution

The fourth proportional to 12,079.44, 18,118.92 and 5,919.12 is: 8,878.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,079.44 : 18,118.92 = 5,919.12 : x
  2. Step 2: Convert to fraction form
    12,079.44/18,118.92 = 5,919.12/x
  3. Step 3: Cross multiply
    12,079.44x = 18,118.92 × 5,919.12
  4. Step 4: Simplify right side
    12,079.44x = 107,248,061.75
  5. Step 5: Solve for x
    x = 107,248,061.75/12,079.44
  6. Step 6: Final answer
    x = 8,878.56

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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.