Home / 7,920.24-11,871.18-2,986.72

Finding the Fourth Proportional to 7,920.24, 11,871.18 and 2,986.72

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Solution

The fourth proportional to 7,920.24, 11,871.18 and 2,986.72 is: 4,476.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,920.24 : 11,871.18 = 2,986.72 : x
  2. Step 2: Convert to fraction form
    7,920.24/11,871.18 = 2,986.72/x
  3. Step 3: Cross multiply
    7,920.24x = 11,871.18 × 2,986.72
  4. Step 4: Simplify right side
    7,920.24x = 35,455,890.73
  5. Step 5: Solve for x
    x = 35,455,890.73/7,920.24
  6. Step 6: Final answer
    x = 4,476.62

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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.