Home / 5,120.03-7,678.41-1,997.69

Finding the Fourth Proportional to 5,120.03, 7,678.41 and 1,997.69

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Solution

The fourth proportional to 5,120.03, 7,678.41 and 1,997.69 is: 2,995.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,120.03 : 7,678.41 = 1,997.69 : x
  2. Step 2: Convert to fraction form
    5,120.03/7,678.41 = 1,997.69/x
  3. Step 3: Cross multiply
    5,120.03x = 7,678.41 × 1,997.69
  4. Step 4: Simplify right side
    5,120.03x = 15,339,044.48
  5. Step 5: Solve for x
    x = 15,339,044.48/5,120.03
  6. Step 6: Final answer
    x = 2,995.89

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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.