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Finding the Third Proportional to 5,391 and 12,415.50

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Solution

The third proportional to 5,391 and 12,415.50 is: 28,592.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,391 : 12,415.50 = 12,415.50 : x
  2. Step 2: Convert to fraction form
    5,391/12,415.50 = 12,415.50/x
  3. Step 3: Cross multiply
    5,391x = 12,415.50 × 12,415.50
  4. Step 4: Simplify right side
    5,391x = 154,144,640.25
  5. Step 5: Solve for x
    x = 154,144,640.25/5,391
  6. Step 6: Final answer
    x = 28,592.96

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Why These Related Problems?

These problems maintain the same ratio (2.30) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.