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Finding the Fourth Proportional to 18,636.95, 25,728.42 and 11,837.81

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Solution

The fourth proportional to 18,636.95, 25,728.42 and 11,837.81 is: 16,342.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,636.95 : 25,728.42 = 11,837.81 : x
  2. Step 2: Convert to fraction form
    18,636.95/25,728.42 = 11,837.81/x
  3. Step 3: Cross multiply
    18,636.95x = 25,728.42 × 11,837.81
  4. Step 4: Simplify right side
    18,636.95x = 304,568,018.92
  5. Step 5: Solve for x
    x = 304,568,018.92/18,636.95
  6. Step 6: Final answer
    x = 16,342.16

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1.5x scale

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.