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Finding the Fourth Proportional to 18,139.51, 27,192.83 and 6,449.99

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Solution

The fourth proportional to 18,139.51, 27,192.83 and 6,449.99 is: 9,669.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,139.51 : 27,192.83 = 6,449.99 : x
  2. Step 2: Convert to fraction form
    18,139.51/27,192.83 = 6,449.99/x
  3. Step 3: Cross multiply
    18,139.51x = 27,192.83 × 6,449.99
  4. Step 4: Simplify right side
    18,139.51x = 175,393,481.57
  5. Step 5: Solve for x
    x = 175,393,481.57/18,139.51
  6. Step 6: Final answer
    x = 9,669.14

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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.