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Finding the Fourth Proportional to 18,702, 25,809.12 and 10,318.32

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Solution

The fourth proportional to 18,702, 25,809.12 and 10,318.32 is: 14,239.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,702 : 25,809.12 = 10,318.32 : x
  2. Step 2: Convert to fraction form
    18,702/25,809.12 = 10,318.32/x
  3. Step 3: Cross multiply
    18,702x = 25,809.12 × 10,318.32
  4. Step 4: Simplify right side
    18,702x = 266,306,759.08
  5. Step 5: Solve for x
    x = 266,306,759.08/18,702
  6. Step 6: Final answer
    x = 14,239.48

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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.