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Finding the Fourth Proportional to 18,290.34, 27,436.68 and 7,902

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Solution

The fourth proportional to 18,290.34, 27,436.68 and 7,902 is: 11,853.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,290.34 : 27,436.68 = 7,902 : x
  2. Step 2: Convert to fraction form
    18,290.34/27,436.68 = 7,902/x
  3. Step 3: Cross multiply
    18,290.34x = 27,436.68 × 7,902
  4. Step 4: Simplify right side
    18,290.34x = 216,804,645.36
  5. Step 5: Solve for x
    x = 216,804,645.36/18,290.34
  6. Step 6: Final answer
    x = 11,853.51

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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.