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Finding the Fourth Proportional to 15,796.15, 21,791.23 and 9,419.11

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Solution

The fourth proportional to 15,796.15, 21,791.23 and 9,419.11 is: 12,993.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,796.15 : 21,791.23 = 9,419.11 : x
  2. Step 2: Convert to fraction form
    15,796.15/21,791.23 = 9,419.11/x
  3. Step 3: Cross multiply
    15,796.15x = 21,791.23 × 9,419.11
  4. Step 4: Simplify right side
    15,796.15x = 205,253,992.41
  5. Step 5: Solve for x
    x = 205,253,992.41/15,796.15
  6. Step 6: Final answer
    x = 12,993.93

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1.5x scale

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.