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Finding the Fourth Proportional to 15,236.00, 21,005 and 13,021.66

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Solution

The fourth proportional to 15,236.00, 21,005 and 13,021.66 is: 17,952.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,236.00 : 21,005 = 13,021.66 : x
  2. Step 2: Convert to fraction form
    15,236.00/21,005 = 13,021.66/x
  3. Step 3: Cross multiply
    15,236.00x = 21,005 × 13,021.66
  4. Step 4: Simplify right side
    15,236.00x = 273,519,863.28
  5. Step 5: Solve for x
    x = 273,519,863.28/15,236.00
  6. Step 6: Final answer
    x = 17,952.22

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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.