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Finding the Third Proportional to 15,808 and 21,435

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Solution

The third proportional to 15,808 and 21,435 is: 29,064.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,808 : 21,435 = 21,435 : x
  2. Step 2: Convert to fraction form
    15,808/21,435 = 21,435/x
  3. Step 3: Cross multiply
    15,808x = 21,435 × 21,435
  4. Step 4: Simplify right side
    15,808x = 459,459,225
  5. Step 5: Solve for x
    x = 459,459,225/15,808
  6. Step 6: Final answer
    x = 29,064.98

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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.