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Finding the Fourth Proportional to 18,999.56, 28,512.30 and 6,687.56

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Solution

The fourth proportional to 18,999.56, 28,512.30 and 6,687.56 is: 10,035.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,999.56 : 28,512.30 = 6,687.56 : x
  2. Step 2: Convert to fraction form
    18,999.56/28,512.30 = 6,687.56/x
  3. Step 3: Cross multiply
    18,999.56x = 28,512.30 × 6,687.56
  4. Step 4: Simplify right side
    18,999.56x = 190,677,813.35
  5. Step 5: Solve for x
    x = 190,677,813.35/18,999.56
  6. Step 6: Final answer
    x = 10,035.91

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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.