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Finding the Fourth Proportional to 18,083.23, 27,128.99 and 6,990.01

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Solution

The fourth proportional to 18,083.23, 27,128.99 and 6,990.01 is: 10,486.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,083.23 : 27,128.99 = 6,990.01 : x
  2. Step 2: Convert to fraction form
    18,083.23/27,128.99 = 6,990.01/x
  3. Step 3: Cross multiply
    18,083.23x = 27,128.99 × 6,990.01
  4. Step 4: Simplify right side
    18,083.23x = 189,631,911.39
  5. Step 5: Solve for x
    x = 189,631,911.39/18,083.23
  6. Step 6: Final answer
    x = 10,486.62

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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.