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Finding the Fourth Proportional to 7,995.92, 11,932.81 and 7,121.12

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Solution

The fourth proportional to 7,995.92, 11,932.81 and 7,121.12 is: 10,627.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,995.92 : 11,932.81 = 7,121.12 : x
  2. Step 2: Convert to fraction form
    7,995.92/11,932.81 = 7,121.12/x
  3. Step 3: Cross multiply
    7,995.92x = 11,932.81 × 7,121.12
  4. Step 4: Simplify right side
    7,995.92x = 84,974,971.95
  5. Step 5: Solve for x
    x = 84,974,971.95/7,995.92
  6. Step 6: Final answer
    x = 10,627.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.