Home / 20,479.16-30,691.92-19,964

Finding the Fourth Proportional to 20,479.16, 30,691.92 and 19,964

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Solution

The fourth proportional to 20,479.16, 30,691.92 and 19,964 is: 29,919.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,479.16 : 30,691.92 = 19,964 : x
  2. Step 2: Convert to fraction form
    20,479.16/30,691.92 = 19,964/x
  3. Step 3: Cross multiply
    20,479.16x = 30,691.92 × 19,964
  4. Step 4: Simplify right side
    20,479.16x = 612,733,490.88
  5. Step 5: Solve for x
    x = 612,733,490.88/20,479.16
  6. Step 6: Final answer
    x = 29,919.85

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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.