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Finding the Fourth Proportional to 7,022.65, 9,690.99 and 3,878.77

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Solution

The fourth proportional to 7,022.65, 9,690.99 and 3,878.77 is: 5,352.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,022.65 : 9,690.99 = 3,878.77 : x
  2. Step 2: Convert to fraction form
    7,022.65/9,690.99 = 3,878.77/x
  3. Step 3: Cross multiply
    7,022.65x = 9,690.99 × 3,878.77
  4. Step 4: Simplify right side
    7,022.65x = 37,589,121.28
  5. Step 5: Solve for x
    x = 37,589,121.28/7,022.65
  6. Step 6: Final answer
    x = 5,352.56

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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.