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Finding the Fourth Proportional to 18,620.86, 27,918.23 and 8,755.06

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Solution

The fourth proportional to 18,620.86, 27,918.23 and 8,755.06 is: 13,126.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,620.86 : 27,918.23 = 8,755.06 : x
  2. Step 2: Convert to fraction form
    18,620.86/27,918.23 = 8,755.06/x
  3. Step 3: Cross multiply
    18,620.86x = 27,918.23 × 8,755.06
  4. Step 4: Simplify right side
    18,620.86x = 244,425,778.74
  5. Step 5: Solve for x
    x = 244,425,778.74/18,620.86
  6. Step 6: Final answer
    x = 13,126.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.