Home / 19,998.80-29,972.23-8,138.75

Finding the Fourth Proportional to 19,998.80, 29,972.23 and 8,138.75

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Solution

The fourth proportional to 19,998.80, 29,972.23 and 8,138.75 is: 12,197.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,998.80 : 29,972.23 = 8,138.75 : x
  2. Step 2: Convert to fraction form
    19,998.80/29,972.23 = 8,138.75/x
  3. Step 3: Cross multiply
    19,998.80x = 29,972.23 × 8,138.75
  4. Step 4: Simplify right side
    19,998.80x = 243,936,316.70
  5. Step 5: Solve for x
    x = 243,936,316.70/19,998.80
  6. Step 6: Final answer
    x = 12,197.55

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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.