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Finding the Fourth Proportional to 13,674.26, 18,866.28 and 8,363.54

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Solution

The fourth proportional to 13,674.26, 18,866.28 and 8,363.54 is: 11,539.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,674.26 : 18,866.28 = 8,363.54 : x
  2. Step 2: Convert to fraction form
    13,674.26/18,866.28 = 8,363.54/x
  3. Step 3: Cross multiply
    13,674.26x = 18,866.28 × 8,363.54
  4. Step 4: Simplify right side
    13,674.26x = 157,788,887.43
  5. Step 5: Solve for x
    x = 157,788,887.43/13,674.26
  6. Step 6: Final answer
    x = 11,539.12

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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.