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Finding the Fourth Proportional to 7,331.76, 10,976.88 and 6,639.84

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Solution

The fourth proportional to 7,331.76, 10,976.88 and 6,639.84 is: 9,940.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,331.76 : 10,976.88 = 6,639.84 : x
  2. Step 2: Convert to fraction form
    7,331.76/10,976.88 = 6,639.84/x
  3. Step 3: Cross multiply
    7,331.76x = 10,976.88 × 6,639.84
  4. Step 4: Simplify right side
    7,331.76x = 72,884,726.90
  5. Step 5: Solve for x
    x = 72,884,726.90/7,331.76
  6. Step 6: Final answer
    x = 9,940.96

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1.5x scale

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.