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Finding the Fourth Proportional to 15,940.44, 21,997.80 and 8,866.80

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Solution

The fourth proportional to 15,940.44, 21,997.80 and 8,866.80 is: 12,236.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,940.44 : 21,997.80 = 8,866.80 : x
  2. Step 2: Convert to fraction form
    15,940.44/21,997.80 = 8,866.80/x
  3. Step 3: Cross multiply
    15,940.44x = 21,997.80 × 8,866.80
  4. Step 4: Simplify right side
    15,940.44x = 195,050,093.04
  5. Step 5: Solve for x
    x = 195,050,093.04/15,940.44
  6. Step 6: Final answer
    x = 12,236.18

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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.