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Finding the Fourth Proportional to 18,847.92, 28,188.96 and 14,189.88

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Solution

The fourth proportional to 18,847.92, 28,188.96 and 14,189.88 is: 21,222.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,847.92 : 28,188.96 = 14,189.88 : x
  2. Step 2: Convert to fraction form
    18,847.92/28,188.96 = 14,189.88/x
  3. Step 3: Cross multiply
    18,847.92x = 28,188.96 × 14,189.88
  4. Step 4: Simplify right side
    18,847.92x = 399,997,959.72
  5. Step 5: Solve for x
    x = 399,997,959.72/18,847.92
  6. Step 6: Final answer
    x = 21,222.39

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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.