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Finding the Fourth Proportional to 15,795, 21,796.07 and 8,721.36

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Solution

The fourth proportional to 15,795, 21,796.07 and 8,721.36 is: 12,034.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,795 : 21,796.07 = 8,721.36 : x
  2. Step 2: Convert to fraction form
    15,795/21,796.07 = 8,721.36/x
  3. Step 3: Cross multiply
    15,795x = 21,796.07 × 8,721.36
  4. Step 4: Simplify right side
    15,795x = 190,091,373.06
  5. Step 5: Solve for x
    x = 190,091,373.06/15,795
  6. Step 6: Final answer
    x = 12,034.91

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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.