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Finding the Fourth Proportional to 18,480.50, 27,720.75 and 7,392.14

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Solution

The fourth proportional to 18,480.50, 27,720.75 and 7,392.14 is: 11,088.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,480.50 : 27,720.75 = 7,392.14 : x
  2. Step 2: Convert to fraction form
    18,480.50/27,720.75 = 7,392.14/x
  3. Step 3: Cross multiply
    18,480.50x = 27,720.75 × 7,392.14
  4. Step 4: Simplify right side
    18,480.50x = 204,915,664.91
  5. Step 5: Solve for x
    x = 204,915,664.91/18,480.50
  6. Step 6: Final answer
    x = 11,088.21

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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.