Home / 21,163.90-31,747.16-5,581.52

Finding the Fourth Proportional to 21,163.90, 31,747.16 and 5,581.52

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Solution

The fourth proportional to 21,163.90, 31,747.16 and 5,581.52 is: 8,372.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,163.90 : 31,747.16 = 5,581.52 : x
  2. Step 2: Convert to fraction form
    21,163.90/31,747.16 = 5,581.52/x
  3. Step 3: Cross multiply
    21,163.90x = 31,747.16 × 5,581.52
  4. Step 4: Simplify right side
    21,163.90x = 177,197,408.48
  5. Step 5: Solve for x
    x = 177,197,408.48/21,163.90
  6. Step 6: Final answer
    x = 8,372.63

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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.