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Finding the Fourth Proportional to 18,653.38, 25,742.15 and 11,480.63

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Solution

The fourth proportional to 18,653.38, 25,742.15 and 11,480.63 is: 15,843.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,653.38 : 25,742.15 = 11,480.63 : x
  2. Step 2: Convert to fraction form
    18,653.38/25,742.15 = 11,480.63/x
  3. Step 3: Cross multiply
    18,653.38x = 25,742.15 × 11,480.63
  4. Step 4: Simplify right side
    18,653.38x = 295,536,099.55
  5. Step 5: Solve for x
    x = 295,536,099.55/18,653.38
  6. Step 6: Final answer
    x = 15,843.57

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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.