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Finding the Fourth Proportional to 6,912.30, 10,359.18 and 6,469.43

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Solution

The fourth proportional to 6,912.30, 10,359.18 and 6,469.43 is: 9,695.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,912.30 : 10,359.18 = 6,469.43 : x
  2. Step 2: Convert to fraction form
    6,912.30/10,359.18 = 6,469.43/x
  3. Step 3: Cross multiply
    6,912.30x = 10,359.18 × 6,469.43
  4. Step 4: Simplify right side
    6,912.30x = 67,017,989.87
  5. Step 5: Solve for x
    x = 67,017,989.87/6,912.30
  6. Step 6: Final answer
    x = 9,695.47

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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.