Home / 7,944.80-11,920.72-2,754.40

Finding the Fourth Proportional to 7,944.80, 11,920.72 and 2,754.40

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Solution

The fourth proportional to 7,944.80, 11,920.72 and 2,754.40 is: 4,132.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,944.80 : 11,920.72 = 2,754.40 : x
  2. Step 2: Convert to fraction form
    7,944.80/11,920.72 = 2,754.40/x
  3. Step 3: Cross multiply
    7,944.80x = 11,920.72 × 2,754.40
  4. Step 4: Simplify right side
    7,944.80x = 32,834,431.17
  5. Step 5: Solve for x
    x = 32,834,431.17/7,944.80
  6. Step 6: Final answer
    x = 4,132.82

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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.