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Finding the Fourth Proportional to 9,371.06, 12,949.20 and 8,915.60

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Solution

The fourth proportional to 9,371.06, 12,949.20 and 8,915.60 is: 12,319.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,371.06 : 12,949.20 = 8,915.60 : x
  2. Step 2: Convert to fraction form
    9,371.06/12,949.20 = 8,915.60/x
  3. Step 3: Cross multiply
    9,371.06x = 12,949.20 × 8,915.60
  4. Step 4: Simplify right side
    9,371.06x = 115,449,887.52
  5. Step 5: Solve for x
    x = 115,449,887.52/9,371.06
  6. Step 6: Final answer
    x = 12,319.83

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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.