Home / 21,239.72-31,863.22-6,450.13

Finding the Fourth Proportional to 21,239.72, 31,863.22 and 6,450.13

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Solution

The fourth proportional to 21,239.72, 31,863.22 and 6,450.13 is: 9,676.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,239.72 : 31,863.22 = 6,450.13 : x
  2. Step 2: Convert to fraction form
    21,239.72/31,863.22 = 6,450.13/x
  3. Step 3: Cross multiply
    21,239.72x = 31,863.22 × 6,450.13
  4. Step 4: Simplify right side
    21,239.72x = 205,521,971.20
  5. Step 5: Solve for x
    x = 205,521,971.20/21,239.72
  6. Step 6: Final answer
    x = 9,676.30

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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.