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Finding the Fourth Proportional to 19,047.94, 28,571.91 and 8,662.66

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Solution

The fourth proportional to 19,047.94, 28,571.91 and 8,662.66 is: 12,993.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,047.94 : 28,571.91 = 8,662.66 : x
  2. Step 2: Convert to fraction form
    19,047.94/28,571.91 = 8,662.66/x
  3. Step 3: Cross multiply
    19,047.94x = 28,571.91 × 8,662.66
  4. Step 4: Simplify right side
    19,047.94x = 247,508,741.88
  5. Step 5: Solve for x
    x = 247,508,741.88/19,047.94
  6. Step 6: Final answer
    x = 12,993.99

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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.