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Finding the Fourth Proportional to 8,606.79, 12,919.91 and 3,416.31

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Solution

The fourth proportional to 8,606.79, 12,919.91 and 3,416.31 is: 5,128.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,606.79 : 12,919.91 = 3,416.31 : x
  2. Step 2: Convert to fraction form
    8,606.79/12,919.91 = 3,416.31/x
  3. Step 3: Cross multiply
    8,606.79x = 12,919.91 × 3,416.31
  4. Step 4: Simplify right side
    8,606.79x = 44,138,400.65
  5. Step 5: Solve for x
    x = 44,138,400.65/8,606.79
  6. Step 6: Final answer
    x = 5,128.32

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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.