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Finding the Fourth Proportional to 12,310.66, 18,473.28 and 4,918.60

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Solution

The fourth proportional to 12,310.66, 18,473.28 and 4,918.60 is: 7,380.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,310.66 : 18,473.28 = 4,918.60 : x
  2. Step 2: Convert to fraction form
    12,310.66/18,473.28 = 4,918.60/x
  3. Step 3: Cross multiply
    12,310.66x = 18,473.28 × 4,918.60
  4. Step 4: Simplify right side
    12,310.66x = 90,862,675.01
  5. Step 5: Solve for x
    x = 90,862,675.01/12,310.66
  6. Step 6: Final answer
    x = 7,380.81

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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.