Home / 7,964.52-11,947.05-2,121.72

Finding the Fourth Proportional to 7,964.52, 11,947.05 and 2,121.72

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Solution

The fourth proportional to 7,964.52, 11,947.05 and 2,121.72 is: 3,182.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,964.52 : 11,947.05 = 2,121.72 : x
  2. Step 2: Convert to fraction form
    7,964.52/11,947.05 = 2,121.72/x
  3. Step 3: Cross multiply
    7,964.52x = 11,947.05 × 2,121.72
  4. Step 4: Simplify right side
    7,964.52x = 25,348,294.93
  5. Step 5: Solve for x
    x = 25,348,294.93/7,964.52
  6. Step 6: Final answer
    x = 3,182.65

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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.