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Finding the Fourth Proportional to 8,976.72, 12,388.08 and 4,997.84

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Solution

The fourth proportional to 8,976.72, 12,388.08 and 4,997.84 is: 6,897.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,976.72 : 12,388.08 = 4,997.84 : x
  2. Step 2: Convert to fraction form
    8,976.72/12,388.08 = 4,997.84/x
  3. Step 3: Cross multiply
    8,976.72x = 12,388.08 × 4,997.84
  4. Step 4: Simplify right side
    8,976.72x = 61,913,641.75
  5. Step 5: Solve for x
    x = 61,913,641.75/8,976.72
  6. Step 6: Final answer
    x = 6,897.13

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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.