Home / 21,001.13-31,479.92-11,137.85

Finding the Fourth Proportional to 21,001.13, 31,479.92 and 11,137.85

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Solution

The fourth proportional to 21,001.13, 31,479.92 and 11,137.85 is: 16,695.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,001.13 : 31,479.92 = 11,137.85 : x
  2. Step 2: Convert to fraction form
    21,001.13/31,479.92 = 11,137.85/x
  3. Step 3: Cross multiply
    21,001.13x = 31,479.92 × 11,137.85
  4. Step 4: Simplify right side
    21,001.13x = 350,618,571.28
  5. Step 5: Solve for x
    x = 350,618,571.28/21,001.13
  6. Step 6: Final answer
    x = 16,695.22

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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.