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Finding the Fourth Proportional to 18,361.35, 25,338.66 and 9,977.85

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Solution

The fourth proportional to 18,361.35, 25,338.66 and 9,977.85 is: 13,769.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,361.35 : 25,338.66 = 9,977.85 : x
  2. Step 2: Convert to fraction form
    18,361.35/25,338.66 = 9,977.85/x
  3. Step 3: Cross multiply
    18,361.35x = 25,338.66 × 9,977.85
  4. Step 4: Simplify right side
    18,361.35x = 252,825,172.10
  5. Step 5: Solve for x
    x = 252,825,172.10/18,361.35
  6. Step 6: Final answer
    x = 13,769.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.