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Finding the Fourth Proportional to 13,697.27, 18,899.82 and 8,393.79

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Solution

The fourth proportional to 13,697.27, 18,899.82 and 8,393.79 is: 11,581.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,697.27 : 18,899.82 = 8,393.79 : x
  2. Step 2: Convert to fraction form
    13,697.27/18,899.82 = 8,393.79/x
  3. Step 3: Cross multiply
    13,697.27x = 18,899.82 × 8,393.79
  4. Step 4: Simplify right side
    13,697.27x = 158,641,120.12
  5. Step 5: Solve for x
    x = 158,641,120.12/13,697.27
  6. Step 6: Final answer
    x = 11,581.95

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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.