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Finding the Third Proportional to 15,390 and 23,985

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Solution

The third proportional to 15,390 and 23,985 is: 37,380.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,390 : 23,985 = 23,985 : x
  2. Step 2: Convert to fraction form
    15,390/23,985 = 23,985/x
  3. Step 3: Cross multiply
    15,390x = 23,985 × 23,985
  4. Step 4: Simplify right side
    15,390x = 575,280,225
  5. Step 5: Solve for x
    x = 575,280,225/15,390
  6. Step 6: Final answer
    x = 37,380.13

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.