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Finding the Fourth Proportional to 15,485.92, 21,375.84 and 9,517.84

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Solution

The fourth proportional to 15,485.92, 21,375.84 and 9,517.84 is: 13,137.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,485.92 : 21,375.84 = 9,517.84 : x
  2. Step 2: Convert to fraction form
    15,485.92/21,375.84 = 9,517.84/x
  3. Step 3: Cross multiply
    15,485.92x = 21,375.84 × 9,517.84
  4. Step 4: Simplify right side
    15,485.92x = 203,451,824.99
  5. Step 5: Solve for x
    x = 203,451,824.99/15,485.92
  6. Step 6: Final answer
    x = 13,137.86

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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.