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Finding the Fourth Proportional to 13,614.63, 18,791.42 and 8,313.90

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Solution

The fourth proportional to 13,614.63, 18,791.42 and 8,313.90 is: 11,475.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,614.63 : 18,791.42 = 8,313.90 : x
  2. Step 2: Convert to fraction form
    13,614.63/18,791.42 = 8,313.90/x
  3. Step 3: Cross multiply
    13,614.63x = 18,791.42 × 8,313.90
  4. Step 4: Simplify right side
    13,614.63x = 156,229,986.74
  5. Step 5: Solve for x
    x = 156,229,986.74/13,614.63
  6. Step 6: Final answer
    x = 11,475.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.