Home / 21,721.36-32,578.20-6,138.64

Finding the Fourth Proportional to 21,721.36, 32,578.20 and 6,138.64

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Solution

The fourth proportional to 21,721.36, 32,578.20 and 6,138.64 is: 9,206.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,721.36 : 32,578.20 = 6,138.64 : x
  2. Step 2: Convert to fraction form
    21,721.36/32,578.20 = 6,138.64/x
  3. Step 3: Cross multiply
    21,721.36x = 32,578.20 × 6,138.64
  4. Step 4: Simplify right side
    21,721.36x = 199,985,841.65
  5. Step 5: Solve for x
    x = 199,985,841.65/21,721.36
  6. Step 6: Final answer
    x = 9,206.87

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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.