Home / 7,920.30-11,882.52-2,989.98

Finding the Fourth Proportional to 7,920.30, 11,882.52 and 2,989.98

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Solution

The fourth proportional to 7,920.30, 11,882.52 and 2,989.98 is: 4,485.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,920.30 : 11,882.52 = 2,989.98 : x
  2. Step 2: Convert to fraction form
    7,920.30/11,882.52 = 2,989.98/x
  3. Step 3: Cross multiply
    7,920.30x = 11,882.52 × 2,989.98
  4. Step 4: Simplify right side
    7,920.30x = 35,528,497.15
  5. Step 5: Solve for x
    x = 35,528,497.15/7,920.30
  6. Step 6: Final answer
    x = 4,485.75

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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.