Home / 15,940.43-21,997.20-8,866.70

Finding the Fourth Proportional to 15,940.43, 21,997.20 and 8,866.70

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Solution

The fourth proportional to 15,940.43, 21,997.20 and 8,866.70 is: 12,235.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,940.43 : 21,997.20 = 8,866.70 : x
  2. Step 2: Convert to fraction form
    15,940.43/21,997.20 = 8,866.70/x
  3. Step 3: Cross multiply
    15,940.43x = 21,997.20 × 8,866.70
  4. Step 4: Simplify right side
    15,940.43x = 195,042,578.99
  5. Step 5: Solve for x
    x = 195,042,578.99/15,940.43
  6. Step 6: Final answer
    x = 12,235.72

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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.