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Finding the Fourth Proportional to 18,656.80, 27,968.64 and 7,571.68

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Solution

The fourth proportional to 18,656.80, 27,968.64 and 7,571.68 is: 11,350.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,656.80 : 27,968.64 = 7,571.68 : x
  2. Step 2: Convert to fraction form
    18,656.80/27,968.64 = 7,571.68/x
  3. Step 3: Cross multiply
    18,656.80x = 27,968.64 × 7,571.68
  4. Step 4: Simplify right side
    18,656.80x = 211,769,592.12
  5. Step 5: Solve for x
    x = 211,769,592.12/18,656.80
  6. Step 6: Final answer
    x = 11,350.80

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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.