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Finding the Fourth Proportional to 7,976.80, 11,008.20 and 4,439.80

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Solution

The fourth proportional to 7,976.80, 11,008.20 and 4,439.80 is: 6,127.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,976.80 : 11,008.20 = 4,439.80 : x
  2. Step 2: Convert to fraction form
    7,976.80/11,008.20 = 4,439.80/x
  3. Step 3: Cross multiply
    7,976.80x = 11,008.20 × 4,439.80
  4. Step 4: Simplify right side
    7,976.80x = 48,874,206.36
  5. Step 5: Solve for x
    x = 48,874,206.36/7,976.80
  6. Step 6: Final answer
    x = 6,127.04

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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.