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Finding the Fourth Proportional to 13,619.93, 18,797.54 and 8,317.82

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Solution

The fourth proportional to 13,619.93, 18,797.54 and 8,317.82 is: 11,479.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,619.93 : 18,797.54 = 8,317.82 : x
  2. Step 2: Convert to fraction form
    13,619.93/18,797.54 = 8,317.82/x
  3. Step 3: Cross multiply
    13,619.93x = 18,797.54 × 8,317.82
  4. Step 4: Simplify right side
    13,619.93x = 156,354,512.57
  5. Step 5: Solve for x
    x = 156,354,512.57/13,619.93
  6. Step 6: Final answer
    x = 11,479.83

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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.