Home / 20,916.97-31,372.68-7,767.56

Finding the Fourth Proportional to 20,916.97, 31,372.68 and 7,767.56

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Solution

The fourth proportional to 20,916.97, 31,372.68 and 7,767.56 is: 11,650.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,916.97 : 31,372.68 = 7,767.56 : x
  2. Step 2: Convert to fraction form
    20,916.97/31,372.68 = 7,767.56/x
  3. Step 3: Cross multiply
    20,916.97x = 31,372.68 × 7,767.56
  4. Step 4: Simplify right side
    20,916.97x = 243,689,174.26
  5. Step 5: Solve for x
    x = 243,689,174.26/20,916.97
  6. Step 6: Final answer
    x = 11,650.31

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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.