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Finding the Fourth Proportional to 12,480.66, 18,723.69 and 3,716.28

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Solution

The fourth proportional to 12,480.66, 18,723.69 and 3,716.28 is: 5,575.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,480.66 : 18,723.69 = 3,716.28 : x
  2. Step 2: Convert to fraction form
    12,480.66/18,723.69 = 3,716.28/x
  3. Step 3: Cross multiply
    12,480.66x = 18,723.69 × 3,716.28
  4. Step 4: Simplify right side
    12,480.66x = 69,582,474.67
  5. Step 5: Solve for x
    x = 69,582,474.67/12,480.66
  6. Step 6: Final answer
    x = 5,575.22

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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.