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Finding the Fourth Proportional to 13,755.45, 18,981.44 and 8,090.41

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Solution

The fourth proportional to 13,755.45, 18,981.44 and 8,090.41 is: 11,164.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,755.45 : 18,981.44 = 8,090.41 : x
  2. Step 2: Convert to fraction form
    13,755.45/18,981.44 = 8,090.41/x
  3. Step 3: Cross multiply
    13,755.45x = 18,981.44 × 8,090.41
  4. Step 4: Simplify right side
    13,755.45x = 153,567,631.99
  5. Step 5: Solve for x
    x = 153,567,631.99/13,755.45
  6. Step 6: Final answer
    x = 11,164.13

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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.