Home / 15,639.53-21,582.45-8,469.29

Finding the Fourth Proportional to 15,639.53, 21,582.45 and 8,469.29

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Solution

The fourth proportional to 15,639.53, 21,582.45 and 8,469.29 is: 11,687.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,639.53 : 21,582.45 = 8,469.29 : x
  2. Step 2: Convert to fraction form
    15,639.53/21,582.45 = 8,469.29/x
  3. Step 3: Cross multiply
    15,639.53x = 21,582.45 × 8,469.29
  4. Step 4: Simplify right side
    15,639.53x = 182,787,933.96
  5. Step 5: Solve for x
    x = 182,787,933.96/15,639.53
  6. Step 6: Final answer
    x = 11,687.56

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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.