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Finding the Fourth Proportional to 11,449.86, 15,791.13 and 7,907.46

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Solution

The fourth proportional to 11,449.86, 15,791.13 and 7,907.46 is: 10,905.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,449.86 : 15,791.13 = 7,907.46 : x
  2. Step 2: Convert to fraction form
    11,449.86/15,791.13 = 7,907.46/x
  3. Step 3: Cross multiply
    11,449.86x = 15,791.13 × 7,907.46
  4. Step 4: Simplify right side
    11,449.86x = 124,867,728.83
  5. Step 5: Solve for x
    x = 124,867,728.83/11,449.86
  6. Step 6: Final answer
    x = 10,905.61

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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.