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Finding the Fourth Proportional to 7,915.48, 10,934.94 and 6,247.96

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Solution

The fourth proportional to 7,915.48, 10,934.94 and 6,247.96 is: 8,631.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,915.48 : 10,934.94 = 6,247.96 : x
  2. Step 2: Convert to fraction form
    7,915.48/10,934.94 = 6,247.96/x
  3. Step 3: Cross multiply
    7,915.48x = 10,934.94 × 6,247.96
  4. Step 4: Simplify right side
    7,915.48x = 68,321,067.72
  5. Step 5: Solve for x
    x = 68,321,067.72/7,915.48
  6. Step 6: Final answer
    x = 8,631.32

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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.