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Finding the Fourth Proportional to 6,940.80, 10,385.28 and 6,863.04

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Solution

The fourth proportional to 6,940.80, 10,385.28 and 6,863.04 is: 10,268.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,940.80 : 10,385.28 = 6,863.04 : x
  2. Step 2: Convert to fraction form
    6,940.80/10,385.28 = 6,863.04/x
  3. Step 3: Cross multiply
    6,940.80x = 10,385.28 × 6,863.04
  4. Step 4: Simplify right side
    6,940.80x = 71,274,592.05
  5. Step 5: Solve for x
    x = 71,274,592.05/6,940.80
  6. Step 6: Final answer
    x = 10,268.93

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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.