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Finding the Third Proportional to 15,650 and 21,315

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Solution

The third proportional to 15,650 and 21,315 is: 29,030.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,650 : 21,315 = 21,315 : x
  2. Step 2: Convert to fraction form
    15,650/21,315 = 21,315/x
  3. Step 3: Cross multiply
    15,650x = 21,315 × 21,315
  4. Step 4: Simplify right side
    15,650x = 454,329,225
  5. Step 5: Solve for x
    x = 454,329,225/15,650
  6. Step 6: Final answer
    x = 29,030.62

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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.