Home / 7,919.24-11,869.68-2,985.72

Finding the Fourth Proportional to 7,919.24, 11,869.68 and 2,985.72

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Solution

The fourth proportional to 7,919.24, 11,869.68 and 2,985.72 is: 4,475.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,919.24 : 11,869.68 = 2,985.72 : x
  2. Step 2: Convert to fraction form
    7,919.24/11,869.68 = 2,985.72/x
  3. Step 3: Cross multiply
    7,919.24x = 11,869.68 × 2,985.72
  4. Step 4: Simplify right side
    7,919.24x = 35,439,540.97
  5. Step 5: Solve for x
    x = 35,439,540.97/7,919.24
  6. Step 6: Final answer
    x = 4,475.12

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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.