Home / 21,310.91-31,965.20-6,519.83

Finding the Fourth Proportional to 21,310.91, 31,965.20 and 6,519.83

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Solution

The fourth proportional to 21,310.91, 31,965.20 and 6,519.83 is: 9,779.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,310.91 : 31,965.20 = 6,519.83 : x
  2. Step 2: Convert to fraction form
    21,310.91/31,965.20 = 6,519.83/x
  3. Step 3: Cross multiply
    21,310.91x = 31,965.20 × 6,519.83
  4. Step 4: Simplify right side
    21,310.91x = 208,407,501.94
  5. Step 5: Solve for x
    x = 208,407,501.94/21,310.91
  6. Step 6: Final answer
    x = 9,779.38

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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.