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Finding the Fourth Proportional to 18,571.65, 27,857.54 and 4,720.65

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Solution

The fourth proportional to 18,571.65, 27,857.54 and 4,720.65 is: 7,080.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,571.65 : 27,857.54 = 4,720.65 : x
  2. Step 2: Convert to fraction form
    18,571.65/27,857.54 = 4,720.65/x
  3. Step 3: Cross multiply
    18,571.65x = 27,857.54 × 4,720.65
  4. Step 4: Simplify right side
    18,571.65x = 131,505,672.60
  5. Step 5: Solve for x
    x = 131,505,672.60/18,571.65
  6. Step 6: Final answer
    x = 7,080.99

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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.