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Finding the Fourth Proportional to 5,678.78, 8,519.97 and 2,169.86

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Solution

The fourth proportional to 5,678.78, 8,519.97 and 2,169.86 is: 3,255.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,678.78 : 8,519.97 = 2,169.86 : x
  2. Step 2: Convert to fraction form
    5,678.78/8,519.97 = 2,169.86/x
  3. Step 3: Cross multiply
    5,678.78x = 8,519.97 × 2,169.86
  4. Step 4: Simplify right side
    5,678.78x = 18,487,142.10
  5. Step 5: Solve for x
    x = 18,487,142.10/5,678.78
  6. Step 6: Final answer
    x = 3,255.48

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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.