Home / 20,328.96-30,508-8,650.38

Finding the Fourth Proportional to 20,328.96, 30,508 and 8,650.38

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Solution

The fourth proportional to 20,328.96, 30,508 and 8,650.38 is: 12,981.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,328.96 : 30,508 = 8,650.38 : x
  2. Step 2: Convert to fraction form
    20,328.96/30,508 = 8,650.38/x
  3. Step 3: Cross multiply
    20,328.96x = 30,508 × 8,650.38
  4. Step 4: Simplify right side
    20,328.96x = 263,905,793.04
  5. Step 5: Solve for x
    x = 263,905,793.04/20,328.96
  6. Step 6: Final answer
    x = 12,981.77

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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.