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Finding the Fourth Proportional to 18,571.15, 27,856.79 and 4,720.15

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Solution

The fourth proportional to 18,571.15, 27,856.79 and 4,720.15 is: 7,080.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,571.15 : 27,856.79 = 4,720.15 : x
  2. Step 2: Convert to fraction form
    18,571.15/27,856.79 = 4,720.15/x
  3. Step 3: Cross multiply
    18,571.15x = 27,856.79 × 4,720.15
  4. Step 4: Simplify right side
    18,571.15x = 131,488,203.72
  5. Step 5: Solve for x
    x = 131,488,203.72/18,571.15
  6. Step 6: Final answer
    x = 7,080.24

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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.