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Finding the Fourth Proportional to 8,169.70, 12,248.55 and 2,619.86

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Solution

The fourth proportional to 8,169.70, 12,248.55 and 2,619.86 is: 3,927.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,169.70 : 12,248.55 = 2,619.86 : x
  2. Step 2: Convert to fraction form
    8,169.70/12,248.55 = 2,619.86/x
  3. Step 3: Cross multiply
    8,169.70x = 12,248.55 × 2,619.86
  4. Step 4: Simplify right side
    8,169.70x = 32,089,486.20
  5. Step 5: Solve for x
    x = 32,089,486.20/8,169.70
  6. Step 6: Final answer
    x = 3,927.87

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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.