Home / 7,022.72-9,691.80-3,879.20

Finding the Fourth Proportional to 7,022.72, 9,691.80 and 3,879.20

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Solution

The fourth proportional to 7,022.72, 9,691.80 and 3,879.20 is: 5,353.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,022.72 : 9,691.80 = 3,879.20 : x
  2. Step 2: Convert to fraction form
    7,022.72/9,691.80 = 3,879.20/x
  3. Step 3: Cross multiply
    7,022.72x = 9,691.80 × 3,879.20
  4. Step 4: Simplify right side
    7,022.72x = 37,596,430.56
  5. Step 5: Solve for x
    x = 37,596,430.56/7,022.72
  6. Step 6: Final answer
    x = 5,353.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.