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Finding the Fourth Proportional to 18,904.14, 28,355.06 and 8,371.09

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Solution

The fourth proportional to 18,904.14, 28,355.06 and 8,371.09 is: 12,556.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,904.14 : 28,355.06 = 8,371.09 : x
  2. Step 2: Convert to fraction form
    18,904.14/28,355.06 = 8,371.09/x
  3. Step 3: Cross multiply
    18,904.14x = 28,355.06 × 8,371.09
  4. Step 4: Simplify right side
    18,904.14x = 237,362,759.22
  5. Step 5: Solve for x
    x = 237,362,759.22/18,904.14
  6. Step 6: Final answer
    x = 12,556.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.