Home / 5,119.43-7,678.77-1,998.85

Finding the Fourth Proportional to 5,119.43, 7,678.77 and 1,998.85

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Solution

The fourth proportional to 5,119.43, 7,678.77 and 1,998.85 is: 2,998.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,119.43 : 7,678.77 = 1,998.85 : x
  2. Step 2: Convert to fraction form
    5,119.43/7,678.77 = 1,998.85/x
  3. Step 3: Cross multiply
    5,119.43x = 7,678.77 × 1,998.85
  4. Step 4: Simplify right side
    5,119.43x = 15,348,671.02
  5. Step 5: Solve for x
    x = 15,348,671.02/5,119.43
  6. Step 6: Final answer
    x = 2,998.12

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Double scale
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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.