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Finding the Fourth Proportional to 6,991.20, 9,641.22 and 5,579.46

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Solution

The fourth proportional to 6,991.20, 9,641.22 and 5,579.46 is: 7,694.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,991.20 : 9,641.22 = 5,579.46 : x
  2. Step 2: Convert to fraction form
    6,991.20/9,641.22 = 5,579.46/x
  3. Step 3: Cross multiply
    6,991.20x = 9,641.22 × 5,579.46
  4. Step 4: Simplify right side
    6,991.20x = 53,792,801.34
  5. Step 5: Solve for x
    x = 53,792,801.34/6,991.20
  6. Step 6: Final answer
    x = 7,694.36

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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.