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Finding the Fourth Proportional to 18,012.68, 27,019.02 and 4,865.39

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Solution

The fourth proportional to 18,012.68, 27,019.02 and 4,865.39 is: 7,298.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,012.68 : 27,019.02 = 4,865.39 : x
  2. Step 2: Convert to fraction form
    18,012.68/27,019.02 = 4,865.39/x
  3. Step 3: Cross multiply
    18,012.68x = 27,019.02 × 4,865.39
  4. Step 4: Simplify right side
    18,012.68x = 131,458,102.81
  5. Step 5: Solve for x
    x = 131,458,102.81/18,012.68
  6. Step 6: Final answer
    x = 7,298.09

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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.