Home / 18,688.48-28,025.42-8,161.72

Finding the Fourth Proportional to 18,688.48, 28,025.42 and 8,161.72

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Solution

The fourth proportional to 18,688.48, 28,025.42 and 8,161.72 is: 12,239.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,688.48 : 28,025.42 = 8,161.72 : x
  2. Step 2: Convert to fraction form
    18,688.48/28,025.42 = 8,161.72/x
  3. Step 3: Cross multiply
    18,688.48x = 28,025.42 × 8,161.72
  4. Step 4: Simplify right side
    18,688.48x = 228,735,520.05
  5. Step 5: Solve for x
    x = 228,735,520.05/18,688.48
  6. Step 6: Final answer
    x = 12,239.39

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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.