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Finding the Fourth Proportional to 18,118.42, 27,168.99 and 7,724.50

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Solution

The fourth proportional to 18,118.42, 27,168.99 and 7,724.50 is: 11,583.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,118.42 : 27,168.99 = 7,724.50 : x
  2. Step 2: Convert to fraction form
    18,118.42/27,168.99 = 7,724.50/x
  3. Step 3: Cross multiply
    18,118.42x = 27,168.99 × 7,724.50
  4. Step 4: Simplify right side
    18,118.42x = 209,866,863.26
  5. Step 5: Solve for x
    x = 209,866,863.26/18,118.42
  6. Step 6: Final answer
    x = 11,583.07

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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.