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Finding the Fourth Proportional to 6,990.73, 9,647.21 and 4,008.29

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Solution

The fourth proportional to 6,990.73, 9,647.21 and 4,008.29 is: 5,531.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,990.73 : 9,647.21 = 4,008.29 : x
  2. Step 2: Convert to fraction form
    6,990.73/9,647.21 = 4,008.29/x
  3. Step 3: Cross multiply
    6,990.73x = 9,647.21 × 4,008.29
  4. Step 4: Simplify right side
    6,990.73x = 38,668,777.16
  5. Step 5: Solve for x
    x = 38,668,777.16/6,990.73
  6. Step 6: Final answer
    x = 5,531.44

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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.