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Finding the Fourth Proportional to 18,609.66, 25,661.62 and 11,895.58

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Solution

The fourth proportional to 18,609.66, 25,661.62 and 11,895.58 is: 16,403.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,609.66 : 25,661.62 = 11,895.58 : x
  2. Step 2: Convert to fraction form
    18,609.66/25,661.62 = 11,895.58/x
  3. Step 3: Cross multiply
    18,609.66x = 25,661.62 × 11,895.58
  4. Step 4: Simplify right side
    18,609.66x = 305,259,853.64
  5. Step 5: Solve for x
    x = 305,259,853.64/18,609.66
  6. Step 6: Final answer
    x = 16,403.30

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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.