Home / 21,470.53-29,629.31-11,911.87

Finding the Fourth Proportional to 21,470.53, 29,629.31 and 11,911.87

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Solution

The fourth proportional to 21,470.53, 29,629.31 and 11,911.87 is: 16,438.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,470.53 : 29,629.31 = 11,911.87 : x
  2. Step 2: Convert to fraction form
    21,470.53/29,629.31 = 11,911.87/x
  3. Step 3: Cross multiply
    21,470.53x = 29,629.31 × 11,911.87
  4. Step 4: Simplify right side
    21,470.53x = 352,940,429.35
  5. Step 5: Solve for x
    x = 352,940,429.35/21,470.53
  6. Step 6: Final answer
    x = 16,438.37

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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.