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Finding the Fourth Proportional to 18,295.29, 25,231.68 and 11,919.48

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Solution

The fourth proportional to 18,295.29, 25,231.68 and 11,919.48 is: 16,438.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,295.29 : 25,231.68 = 11,919.48 : x
  2. Step 2: Convert to fraction form
    18,295.29/25,231.68 = 11,919.48/x
  3. Step 3: Cross multiply
    18,295.29x = 25,231.68 × 11,919.48
  4. Step 4: Simplify right side
    18,295.29x = 300,748,505.13
  5. Step 5: Solve for x
    x = 300,748,505.13/18,295.29
  6. Step 6: Final answer
    x = 16,438.58

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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.