Home / 21,101.31-29,120-11,670.03

Finding the Fourth Proportional to 21,101.31, 29,120 and 11,670.03

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Solution

The fourth proportional to 21,101.31, 29,120 and 11,670.03 is: 16,104.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,101.31 : 29,120 = 11,670.03 : x
  2. Step 2: Convert to fraction form
    21,101.31/29,120 = 11,670.03/x
  3. Step 3: Cross multiply
    21,101.31x = 29,120 × 11,670.03
  4. Step 4: Simplify right side
    21,101.31x = 339,831,273.60
  5. Step 5: Solve for x
    x = 339,831,273.60/21,101.31
  6. Step 6: Final answer
    x = 16,104.75

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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.