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Finding the Fourth Proportional to 18,782.92, 25,918.62 and 11,227.75

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Solution

The fourth proportional to 18,782.92, 25,918.62 and 11,227.75 is: 15,493.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,782.92 : 25,918.62 = 11,227.75 : x
  2. Step 2: Convert to fraction form
    18,782.92/25,918.62 = 11,227.75/x
  3. Step 3: Cross multiply
    18,782.92x = 25,918.62 × 11,227.75
  4. Step 4: Simplify right side
    18,782.92x = 291,007,785.71
  5. Step 5: Solve for x
    x = 291,007,785.71/18,782.92
  6. Step 6: Final answer
    x = 15,493.21

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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.