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Finding the Fourth Proportional to 43,649.82, 65,474.74 and 12,485.07

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Solution

The fourth proportional to 43,649.82, 65,474.74 and 12,485.07 is: 18,727.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,649.82 : 65,474.74 = 12,485.07 : x
  2. Step 2: Convert to fraction form
    43,649.82/65,474.74 = 12,485.07/x
  3. Step 3: Cross multiply
    43,649.82x = 65,474.74 × 12,485.07
  4. Step 4: Simplify right side
    43,649.82x = 817,456,942.51
  5. Step 5: Solve for x
    x = 817,456,942.51/43,649.82
  6. Step 6: Final answer
    x = 18,727.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.