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Finding the Fourth Proportional to 20,107.64, 30,042.41 and 19,418.60

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Solution

The fourth proportional to 20,107.64, 30,042.41 and 19,418.60 is: 29,012.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,107.64 : 30,042.41 = 19,418.60 : x
  2. Step 2: Convert to fraction form
    20,107.64/30,042.41 = 19,418.60/x
  3. Step 3: Cross multiply
    20,107.64x = 30,042.41 × 19,418.60
  4. Step 4: Simplify right side
    20,107.64x = 583,381,542.83
  5. Step 5: Solve for x
    x = 583,381,542.83/20,107.64
  6. Step 6: Final answer
    x = 29,012.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.