Home / 21,160.72-31,744.32-5,579.56

Finding the Fourth Proportional to 21,160.72, 31,744.32 and 5,579.56

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Solution

The fourth proportional to 21,160.72, 31,744.32 and 5,579.56 is: 8,370.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,160.72 : 31,744.32 = 5,579.56 : x
  2. Step 2: Convert to fraction form
    21,160.72/31,744.32 = 5,579.56/x
  3. Step 3: Cross multiply
    21,160.72x = 31,744.32 × 5,579.56
  4. Step 4: Simplify right side
    21,160.72x = 177,119,338.10
  5. Step 5: Solve for x
    x = 177,119,338.10/21,160.72
  6. Step 6: Final answer
    x = 8,370.19

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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.