Home / 15,665.91-21,620.09-8,951.38

Finding the Fourth Proportional to 15,665.91, 21,620.09 and 8,951.38

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Solution

The fourth proportional to 15,665.91, 21,620.09 and 8,951.38 is: 12,353.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,665.91 : 21,620.09 = 8,951.38 : x
  2. Step 2: Convert to fraction form
    15,665.91/21,620.09 = 8,951.38/x
  3. Step 3: Cross multiply
    15,665.91x = 21,620.09 × 8,951.38
  4. Step 4: Simplify right side
    15,665.91x = 193,529,629.98
  5. Step 5: Solve for x
    x = 193,529,629.98/15,665.91
  6. Step 6: Final answer
    x = 12,353.55

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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.