Home / 20,786.98-31,192.76-7,648.57

Finding the Fourth Proportional to 20,786.98, 31,192.76 and 7,648.57

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Solution

The fourth proportional to 20,786.98, 31,192.76 and 7,648.57 is: 11,477.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,786.98 : 31,192.76 = 7,648.57 : x
  2. Step 2: Convert to fraction form
    20,786.98/31,192.76 = 7,648.57/x
  3. Step 3: Cross multiply
    20,786.98x = 31,192.76 × 7,648.57
  4. Step 4: Simplify right side
    20,786.98x = 238,579,814.15
  5. Step 5: Solve for x
    x = 238,579,814.15/20,786.98
  6. Step 6: Final answer
    x = 11,477.37

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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.