Home / 20,190.90-30,249.90-18,878.70

Finding the Fourth Proportional to 20,190.90, 30,249.90 and 18,878.70

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Solution

The fourth proportional to 20,190.90, 30,249.90 and 18,878.70 is: 28,283.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,190.90 : 30,249.90 = 18,878.70 : x
  2. Step 2: Convert to fraction form
    20,190.90/30,249.90 = 18,878.70/x
  3. Step 3: Cross multiply
    20,190.90x = 30,249.90 × 18,878.70
  4. Step 4: Simplify right side
    20,190.90x = 571,078,787.13
  5. Step 5: Solve for x
    x = 571,078,787.13/20,190.90
  6. Step 6: Final answer
    x = 28,283.97

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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.