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Finding the Fourth Proportional to 18,388.73, 25,378.16 and 10,837.40

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Solution

The fourth proportional to 18,388.73, 25,378.16 and 10,837.40 is: 14,956.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,388.73 : 25,378.16 = 10,837.40 : x
  2. Step 2: Convert to fraction form
    18,388.73/25,378.16 = 10,837.40/x
  3. Step 3: Cross multiply
    18,388.73x = 25,378.16 × 10,837.40
  4. Step 4: Simplify right side
    18,388.73x = 275,033,090.11
  5. Step 5: Solve for x
    x = 275,033,090.11/18,388.73
  6. Step 6: Final answer
    x = 14,956.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.