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Finding the Third Proportional to 15,136 and 19,985

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Solution

The third proportional to 15,136 and 19,985 is: 26,387.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,136 : 19,985 = 19,985 : x
  2. Step 2: Convert to fraction form
    15,136/19,985 = 19,985/x
  3. Step 3: Cross multiply
    15,136x = 19,985 × 19,985
  4. Step 4: Simplify right side
    15,136x = 399,400,225
  5. Step 5: Solve for x
    x = 399,400,225/15,136
  6. Step 6: Final answer
    x = 26,387.44

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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.