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Finding the Third Proportional to 12,988.50 and 28,407

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Solution

The third proportional to 12,988.50 and 28,407 is: 62,128.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,988.50 : 28,407 = 28,407 : x
  2. Step 2: Convert to fraction form
    12,988.50/28,407 = 28,407/x
  3. Step 3: Cross multiply
    12,988.50x = 28,407 × 28,407
  4. Step 4: Simplify right side
    12,988.50x = 806,957,649
  5. Step 5: Solve for x
    x = 806,957,649/12,988.50
  6. Step 6: Final answer
    x = 62,128.63

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.