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Finding the Fourth Proportional to 18,362.51, 27,540.10 and 5,211.35

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Solution

The fourth proportional to 18,362.51, 27,540.10 and 5,211.35 is: 7,815.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,362.51 : 27,540.10 = 5,211.35 : x
  2. Step 2: Convert to fraction form
    18,362.51/27,540.10 = 5,211.35/x
  3. Step 3: Cross multiply
    18,362.51x = 27,540.10 × 5,211.35
  4. Step 4: Simplify right side
    18,362.51x = 143,521,100.14
  5. Step 5: Solve for x
    x = 143,521,100.14/18,362.51
  6. Step 6: Final answer
    x = 7,815.98

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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.