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Finding the Fourth Proportional to 20,625.47, 30,938.22 and 7,477.85

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Solution

The fourth proportional to 20,625.47, 30,938.22 and 7,477.85 is: 11,216.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,625.47 : 30,938.22 = 7,477.85 : x
  2. Step 2: Convert to fraction form
    20,625.47/30,938.22 = 7,477.85/x
  3. Step 3: Cross multiply
    20,625.47x = 30,938.22 × 7,477.85
  4. Step 4: Simplify right side
    20,625.47x = 231,351,445.77
  5. Step 5: Solve for x
    x = 231,351,445.77/20,625.47
  6. Step 6: Final answer
    x = 11,216.78

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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.