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Finding the Fourth Proportional to 21,800.22, 32,680.62 and 7,945.98

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Solution

The fourth proportional to 21,800.22, 32,680.62 and 7,945.98 is: 11,911.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,800.22 : 32,680.62 = 7,945.98 : x
  2. Step 2: Convert to fraction form
    21,800.22/32,680.62 = 7,945.98/x
  3. Step 3: Cross multiply
    21,800.22x = 32,680.62 × 7,945.98
  4. Step 4: Simplify right side
    21,800.22x = 259,679,552.91
  5. Step 5: Solve for x
    x = 259,679,552.91/21,800.22
  6. Step 6: Final answer
    x = 11,911.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.