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Finding the Fourth Proportional to 20,625.85, 30,938.87 and 8,777.94

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Solution

The fourth proportional to 20,625.85, 30,938.87 and 8,777.94 is: 13,166.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,625.85 : 30,938.87 = 8,777.94 : x
  2. Step 2: Convert to fraction form
    20,625.85/30,938.87 = 8,777.94/x
  3. Step 3: Cross multiply
    20,625.85x = 30,938.87 × 8,777.94
  4. Step 4: Simplify right side
    20,625.85x = 271,579,544.53
  5. Step 5: Solve for x
    x = 271,579,544.53/20,625.85
  6. Step 6: Final answer
    x = 13,166.95

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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.