Home / 8,219.12-11,343.81-7,945.75

Finding the Fourth Proportional to 8,219.12, 11,343.81 and 7,945.75

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Solution

The fourth proportional to 8,219.12, 11,343.81 and 7,945.75 is: 10,966.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,219.12 : 11,343.81 = 7,945.75 : x
  2. Step 2: Convert to fraction form
    8,219.12/11,343.81 = 7,945.75/x
  3. Step 3: Cross multiply
    8,219.12x = 11,343.81 × 7,945.75
  4. Step 4: Simplify right side
    8,219.12x = 90,135,049.95
  5. Step 5: Solve for x
    x = 90,135,049.95/8,219.12
  6. Step 6: Final answer
    x = 10,966.51

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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.