Home / 15,639.22-21,581.97-8,469.01

Finding the Fourth Proportional to 15,639.22, 21,581.97 and 8,469.01

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Solution

The fourth proportional to 15,639.22, 21,581.97 and 8,469.01 is: 11,687.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,639.22 : 21,581.97 = 8,469.01 : x
  2. Step 2: Convert to fraction form
    15,639.22/21,581.97 = 8,469.01/x
  3. Step 3: Cross multiply
    15,639.22x = 21,581.97 × 8,469.01
  4. Step 4: Simplify right side
    15,639.22x = 182,777,919.75
  5. Step 5: Solve for x
    x = 182,777,919.75/15,639.22
  6. Step 6: Final answer
    x = 11,687.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.