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Finding the Fourth Proportional to 18,571.72, 27,857.63 and 4,720.72

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Solution

The fourth proportional to 18,571.72, 27,857.63 and 4,720.72 is: 7,081.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,571.72 : 27,857.63 = 4,720.72 : x
  2. Step 2: Convert to fraction form
    18,571.72/27,857.63 = 4,720.72/x
  3. Step 3: Cross multiply
    18,571.72x = 27,857.63 × 4,720.72
  4. Step 4: Simplify right side
    18,571.72x = 131,507,931.81
  5. Step 5: Solve for x
    x = 131,507,931.81/18,571.72
  6. Step 6: Final answer
    x = 7,081.09

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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.