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Finding the Fourth Proportional to 21,995.62, 32,990.15 and 7,205.09

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Solution

The fourth proportional to 21,995.62, 32,990.15 and 7,205.09 is: 10,806.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,995.62 : 32,990.15 = 7,205.09 : x
  2. Step 2: Convert to fraction form
    21,995.62/32,990.15 = 7,205.09/x
  3. Step 3: Cross multiply
    21,995.62x = 32,990.15 × 7,205.09
  4. Step 4: Simplify right side
    21,995.62x = 237,696,852.93
  5. Step 5: Solve for x
    x = 237,696,852.93/21,995.62
  6. Step 6: Final answer
    x = 10,806.56

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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.