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Finding the Fourth Proportional to 8,616, 11,889.52 and 5,079.04

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Solution

The fourth proportional to 8,616, 11,889.52 and 5,079.04 is: 7,008.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,616 : 11,889.52 = 5,079.04 : x
  2. Step 2: Convert to fraction form
    8,616/11,889.52 = 5,079.04/x
  3. Step 3: Cross multiply
    8,616x = 11,889.52 × 5,079.04
  4. Step 4: Simplify right side
    8,616x = 60,387,347.66
  5. Step 5: Solve for x
    x = 60,387,347.66/8,616
  6. Step 6: Final answer
    x = 7,008.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.