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Finding the Fourth Proportional to 18,439.65, 27,649.76 and 8,039.25

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Solution

The fourth proportional to 18,439.65, 27,649.76 and 8,039.25 is: 12,054.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,439.65 : 27,649.76 = 8,039.25 : x
  2. Step 2: Convert to fraction form
    18,439.65/27,649.76 = 8,039.25/x
  3. Step 3: Cross multiply
    18,439.65x = 27,649.76 × 8,039.25
  4. Step 4: Simplify right side
    18,439.65x = 222,283,292.88
  5. Step 5: Solve for x
    x = 222,283,292.88/18,439.65
  6. Step 6: Final answer
    x = 12,054.64

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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.