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Finding the Fourth Proportional to 8,976.87, 12,387.87 and 4,997.90

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Solution

The fourth proportional to 8,976.87, 12,387.87 and 4,997.90 is: 6,896.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,976.87 : 12,387.87 = 4,997.90 : x
  2. Step 2: Convert to fraction form
    8,976.87/12,387.87 = 4,997.90/x
  3. Step 3: Cross multiply
    8,976.87x = 12,387.87 × 4,997.90
  4. Step 4: Simplify right side
    8,976.87x = 61,913,366.44
  5. Step 5: Solve for x
    x = 61,913,366.44/8,976.87
  6. Step 6: Final answer
    x = 6,896.99

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1.5x scale

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.