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Finding the Fourth Proportional to 18,328.68, 27,488.16 and 7,938

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Solution

The fourth proportional to 18,328.68, 27,488.16 and 7,938 is: 11,904.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,328.68 : 27,488.16 = 7,938 : x
  2. Step 2: Convert to fraction form
    18,328.68/27,488.16 = 7,938/x
  3. Step 3: Cross multiply
    18,328.68x = 27,488.16 × 7,938
  4. Step 4: Simplify right side
    18,328.68x = 218,201,014.08
  5. Step 5: Solve for x
    x = 218,201,014.08/18,328.68
  6. Step 6: Final answer
    x = 11,904.90

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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.