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Finding the Third Proportional to 21,278.81 and 30,919.13

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Solution

The third proportional to 21,278.81 and 30,919.13 is: 44,926.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,278.81 : 30,919.13 = 30,919.13 : x
  2. Step 2: Convert to fraction form
    21,278.81/30,919.13 = 30,919.13/x
  3. Step 3: Cross multiply
    21,278.81x = 30,919.13 × 30,919.13
  4. Step 4: Simplify right side
    21,278.81x = 955,992,290.77
  5. Step 5: Solve for x
    x = 955,992,290.77/21,278.81
  6. Step 6: Final answer
    x = 44,926.96

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Why These Related Problems?

These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.