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Finding the Fourth Proportional to 18,608.76, 27,914.96 and 6,128.88

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Solution

The fourth proportional to 18,608.76, 27,914.96 and 6,128.88 is: 9,193.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,608.76 : 27,914.96 = 6,128.88 : x
  2. Step 2: Convert to fraction form
    18,608.76/27,914.96 = 6,128.88/x
  3. Step 3: Cross multiply
    18,608.76x = 27,914.96 × 6,128.88
  4. Step 4: Simplify right side
    18,608.76x = 171,087,409.40
  5. Step 5: Solve for x
    x = 171,087,409.40/18,608.76
  6. Step 6: Final answer
    x = 9,193.92

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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.