Home / 21,788.72-32,640.84-11,375.36

Finding the Fourth Proportional to 21,788.72, 32,640.84 and 11,375.36

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Solution

The fourth proportional to 21,788.72, 32,640.84 and 11,375.36 is: 17,040.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,788.72 : 32,640.84 = 11,375.36 : x
  2. Step 2: Convert to fraction form
    21,788.72/32,640.84 = 11,375.36/x
  3. Step 3: Cross multiply
    21,788.72x = 32,640.84 × 11,375.36
  4. Step 4: Simplify right side
    21,788.72x = 371,301,305.70
  5. Step 5: Solve for x
    x = 371,301,305.70/21,788.72
  6. Step 6: Final answer
    x = 17,040.99

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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.