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Finding the Fourth Proportional to 21,995.55, 32,990.22 and 7,205.09

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Solution

The fourth proportional to 21,995.55, 32,990.22 and 7,205.09 is: 10,806.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,995.55 : 32,990.22 = 7,205.09 : x
  2. Step 2: Convert to fraction form
    21,995.55/32,990.22 = 7,205.09/x
  3. Step 3: Cross multiply
    21,995.55x = 32,990.22 × 7,205.09
  4. Step 4: Simplify right side
    21,995.55x = 237,697,339.27
  5. Step 5: Solve for x
    x = 237,697,339.27/21,995.55
  6. Step 6: Final answer
    x = 10,806.61

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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.