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Finding the Third Proportional to 10,428 and 13,778

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Solution

The third proportional to 10,428 and 13,778 is: 18,204.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,428 : 13,778 = 13,778 : x
  2. Step 2: Convert to fraction form
    10,428/13,778 = 13,778/x
  3. Step 3: Cross multiply
    10,428x = 13,778 × 13,778
  4. Step 4: Simplify right side
    10,428x = 189,833,284
  5. Step 5: Solve for x
    x = 189,833,284/10,428
  6. Step 6: Final answer
    x = 18,204.19

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Why These Related Problems?

These problems maintain the same ratio (1.32) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.