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Finding the Third Proportional to 5,415 and 12,559.50

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Solution

The third proportional to 5,415 and 12,559.50 is: 29,130.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,415 : 12,559.50 = 12,559.50 : x
  2. Step 2: Convert to fraction form
    5,415/12,559.50 = 12,559.50/x
  3. Step 3: Cross multiply
    5,415x = 12,559.50 × 12,559.50
  4. Step 4: Simplify right side
    5,415x = 157,741,040.25
  5. Step 5: Solve for x
    x = 157,741,040.25/5,415
  6. Step 6: Final answer
    x = 29,130.39

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Why These Related Problems?

These problems maintain the same ratio (2.32) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.