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Finding the Third Proportional to 21,054 and 28,629

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Solution

The third proportional to 21,054 and 28,629 is: 38,929.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,054 : 28,629 = 28,629 : x
  2. Step 2: Convert to fraction form
    21,054/28,629 = 28,629/x
  3. Step 3: Cross multiply
    21,054x = 28,629 × 28,629
  4. Step 4: Simplify right side
    21,054x = 819,619,641
  5. Step 5: Solve for x
    x = 819,619,641/21,054
  6. Step 6: Final answer
    x = 38,929.40

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.