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Finding the Fourth Proportional to 18,480.50, 27,720.78 and 4,629.50

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Solution

The fourth proportional to 18,480.50, 27,720.78 and 4,629.50 is: 6,944.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,480.50 : 27,720.78 = 4,629.50 : x
  2. Step 2: Convert to fraction form
    18,480.50/27,720.78 = 4,629.50/x
  3. Step 3: Cross multiply
    18,480.50x = 27,720.78 × 4,629.50
  4. Step 4: Simplify right side
    18,480.50x = 128,333,351.01
  5. Step 5: Solve for x
    x = 128,333,351.01/18,480.50
  6. Step 6: Final answer
    x = 6,944.26

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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.