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Finding the Fourth Proportional to 8,979.86, 13,469.86 and 3,358.80

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Solution

The fourth proportional to 8,979.86, 13,469.86 and 3,358.80 is: 5,038.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,979.86 : 13,469.86 = 3,358.80 : x
  2. Step 2: Convert to fraction form
    8,979.86/13,469.86 = 3,358.80/x
  3. Step 3: Cross multiply
    8,979.86x = 13,469.86 × 3,358.80
  4. Step 4: Simplify right side
    8,979.86x = 45,242,565.77
  5. Step 5: Solve for x
    x = 45,242,565.77/8,979.86
  6. Step 6: Final answer
    x = 5,038.23

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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.