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Finding the Fourth Proportional to 21,992.40, 32,976.45 and 7,193.70

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Solution

The fourth proportional to 21,992.40, 32,976.45 and 7,193.70 is: 10,786.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,992.40 : 32,976.45 = 7,193.70 : x
  2. Step 2: Convert to fraction form
    21,992.40/32,976.45 = 7,193.70/x
  3. Step 3: Cross multiply
    21,992.40x = 32,976.45 × 7,193.70
  4. Step 4: Simplify right side
    21,992.40x = 237,222,688.37
  5. Step 5: Solve for x
    x = 237,222,688.37/21,992.40
  6. Step 6: Final answer
    x = 10,786.58

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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.