Home / 21,273.26-29,360.40-12,780.11

Finding the Fourth Proportional to 21,273.26, 29,360.40 and 12,780.11

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Solution

The fourth proportional to 21,273.26, 29,360.40 and 12,780.11 is: 17,638.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,273.26 : 29,360.40 = 12,780.11 : x
  2. Step 2: Convert to fraction form
    21,273.26/29,360.40 = 12,780.11/x
  3. Step 3: Cross multiply
    21,273.26x = 29,360.40 × 12,780.11
  4. Step 4: Simplify right side
    21,273.26x = 375,229,141.64
  5. Step 5: Solve for x
    x = 375,229,141.64/21,273.26
  6. Step 6: Final answer
    x = 17,638.54

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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.