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Finding the Fourth Proportional to 18,989.66, 28,484.55 and 11,193

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Solution

The fourth proportional to 18,989.66, 28,484.55 and 11,193 is: 16,789.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,989.66 : 28,484.55 = 11,193 : x
  2. Step 2: Convert to fraction form
    18,989.66/28,484.55 = 11,193/x
  3. Step 3: Cross multiply
    18,989.66x = 28,484.55 × 11,193
  4. Step 4: Simplify right side
    18,989.66x = 318,827,568.15
  5. Step 5: Solve for x
    x = 318,827,568.15/18,989.66
  6. Step 6: Final answer
    x = 16,789.54

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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.