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Finding the Third Proportional to 18,139.13 and 28,029.56

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Solution

The third proportional to 18,139.13 and 28,029.56 is: 43,312.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,139.13 : 28,029.56 = 28,029.56 : x
  2. Step 2: Convert to fraction form
    18,139.13/28,029.56 = 28,029.56/x
  3. Step 3: Cross multiply
    18,139.13x = 28,029.56 × 28,029.56
  4. Step 4: Simplify right side
    18,139.13x = 785,656,373.94
  5. Step 5: Solve for x
    x = 785,656,373.94/18,139.13
  6. Step 6: Final answer
    x = 43,312.80

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.