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Finding the Third Proportional to 5,476 and 8,428

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Solution

The third proportional to 5,476 and 8,428 is: 12,971.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,476 : 8,428 = 8,428 : x
  2. Step 2: Convert to fraction form
    5,476/8,428 = 8,428/x
  3. Step 3: Cross multiply
    5,476x = 8,428 × 8,428
  4. Step 4: Simplify right side
    5,476x = 71,031,184
  5. Step 5: Solve for x
    x = 71,031,184/5,476
  6. Step 6: Final answer
    x = 12,971.36

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.