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Finding the Fourth Proportional to 13,668.37, 18,863.16 and 8,364.22

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Solution

The fourth proportional to 13,668.37, 18,863.16 and 8,364.22 is: 11,543.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,668.37 : 18,863.16 = 8,364.22 : x
  2. Step 2: Convert to fraction form
    13,668.37/18,863.16 = 8,364.22/x
  3. Step 3: Cross multiply
    13,668.37x = 18,863.16 × 8,364.22
  4. Step 4: Simplify right side
    13,668.37x = 157,775,620.14
  5. Step 5: Solve for x
    x = 157,775,620.14/13,668.37
  6. Step 6: Final answer
    x = 11,543.12

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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.