Home / 7,947.28-11,921.86-2,103.94

Finding the Fourth Proportional to 7,947.28, 11,921.86 and 2,103.94

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Solution

The fourth proportional to 7,947.28, 11,921.86 and 2,103.94 is: 3,156.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,947.28 : 11,921.86 = 2,103.94 : x
  2. Step 2: Convert to fraction form
    7,947.28/11,921.86 = 2,103.94/x
  3. Step 3: Cross multiply
    7,947.28x = 11,921.86 × 2,103.94
  4. Step 4: Simplify right side
    7,947.28x = 25,082,878.13
  5. Step 5: Solve for x
    x = 25,082,878.13/7,947.28
  6. Step 6: Final answer
    x = 3,156.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.