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Finding the Fourth Proportional to 38,361.80, 57,542.70 and 12,074.60

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Solution

The fourth proportional to 38,361.80, 57,542.70 and 12,074.60 is: 18,111.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,361.80 : 57,542.70 = 12,074.60 : x
  2. Step 2: Convert to fraction form
    38,361.80/57,542.70 = 12,074.60/x
  3. Step 3: Cross multiply
    38,361.80x = 57,542.70 × 12,074.60
  4. Step 4: Simplify right side
    38,361.80x = 694,805,085.42
  5. Step 5: Solve for x
    x = 694,805,085.42/38,361.80
  6. Step 6: Final answer
    x = 18,111.90

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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.