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Finding the Third Proportional to 19,721.44 and 28,890.18

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Solution

The third proportional to 19,721.44 and 28,890.18 is: 42,321.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,721.44 : 28,890.18 = 28,890.18 : x
  2. Step 2: Convert to fraction form
    19,721.44/28,890.18 = 28,890.18/x
  3. Step 3: Cross multiply
    19,721.44x = 28,890.18 × 28,890.18
  4. Step 4: Simplify right side
    19,721.44x = 834,642,764.51
  5. Step 5: Solve for x
    x = 834,642,764.51/19,721.44
  6. Step 6: Final answer
    x = 42,321.59

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.