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Finding the Third Proportional to 18,739.69 and 28,490.91

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Solution

The third proportional to 18,739.69 and 28,490.91 is: 43,316.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,739.69 : 28,490.91 = 28,490.91 : x
  2. Step 2: Convert to fraction form
    18,739.69/28,490.91 = 28,490.91/x
  3. Step 3: Cross multiply
    18,739.69x = 28,490.91 × 28,490.91
  4. Step 4: Simplify right side
    18,739.69x = 811,731,738.95
  5. Step 5: Solve for x
    x = 811,731,738.95/18,739.69
  6. Step 6: Final answer
    x = 43,316.18

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.