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Finding the Fourth Proportional to 6,396.70, 8,825.90 and 3,602.20

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Solution

The fourth proportional to 6,396.70, 8,825.90 and 3,602.20 is: 4,970.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,396.70 : 8,825.90 = 3,602.20 : x
  2. Step 2: Convert to fraction form
    6,396.70/8,825.90 = 3,602.20/x
  3. Step 3: Cross multiply
    6,396.70x = 8,825.90 × 3,602.20
  4. Step 4: Simplify right side
    6,396.70x = 31,792,656.98
  5. Step 5: Solve for x
    x = 31,792,656.98/6,396.70
  6. Step 6: Final answer
    x = 4,970.17

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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.