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Finding the Fourth Proportional to 13,755.09, 18,982.10 and 8,090.08

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Solution

The fourth proportional to 13,755.09, 18,982.10 and 8,090.08 is: 11,164.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,755.09 : 18,982.10 = 8,090.08 : x
  2. Step 2: Convert to fraction form
    13,755.09/18,982.10 = 8,090.08/x
  3. Step 3: Cross multiply
    13,755.09x = 18,982.10 × 8,090.08
  4. Step 4: Simplify right side
    13,755.09x = 153,566,634.83
  5. Step 5: Solve for x
    x = 153,566,634.83/13,755.09
  6. Step 6: Final answer
    x = 11,164.35

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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.