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Finding the Third Proportional to 13,428 and 15,444

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Solution

The third proportional to 13,428 and 15,444 is: 17,762.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,428 : 15,444 = 15,444 : x
  2. Step 2: Convert to fraction form
    13,428/15,444 = 15,444/x
  3. Step 3: Cross multiply
    13,428x = 15,444 × 15,444
  4. Step 4: Simplify right side
    13,428x = 238,517,136
  5. Step 5: Solve for x
    x = 238,517,136/13,428
  6. Step 6: Final answer
    x = 17,762.67

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Why These Related Problems?

These problems maintain the same ratio (1.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.