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Finding the Third Proportional to 18,979.88 and 27,779.63

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Solution

The third proportional to 18,979.88 and 27,779.63 is: 40,659.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,979.88 : 27,779.63 = 27,779.63 : x
  2. Step 2: Convert to fraction form
    18,979.88/27,779.63 = 27,779.63/x
  3. Step 3: Cross multiply
    18,979.88x = 27,779.63 × 27,779.63
  4. Step 4: Simplify right side
    18,979.88x = 771,707,565.14
  5. Step 5: Solve for x
    x = 771,707,565.14/18,979.88
  6. Step 6: Final answer
    x = 40,659.25

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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.