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Finding the Fourth Proportional to 18,679.44, 28,019.34 and 8,790.60

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Solution

The fourth proportional to 18,679.44, 28,019.34 and 8,790.60 is: 13,185.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,679.44 : 28,019.34 = 8,790.60 : x
  2. Step 2: Convert to fraction form
    18,679.44/28,019.34 = 8,790.60/x
  3. Step 3: Cross multiply
    18,679.44x = 28,019.34 × 8,790.60
  4. Step 4: Simplify right side
    18,679.44x = 246,306,810.20
  5. Step 5: Solve for x
    x = 246,306,810.20/18,679.44
  6. Step 6: Final answer
    x = 13,185.98

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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.