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Finding the Fourth Proportional to 18,610.96, 27,910.88 and 6,128.68

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Solution

The fourth proportional to 18,610.96, 27,910.88 and 6,128.68 is: 9,191.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,610.96 : 27,910.88 = 6,128.68 : x
  2. Step 2: Convert to fraction form
    18,610.96/27,910.88 = 6,128.68/x
  3. Step 3: Cross multiply
    18,610.96x = 27,910.88 × 6,128.68
  4. Step 4: Simplify right side
    18,610.96x = 171,056,852.04
  5. Step 5: Solve for x
    x = 171,056,852.04/18,610.96
  6. Step 6: Final answer
    x = 9,191.19

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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.