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Finding the Third Proportional to 18,989 and 28,329

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Solution

The third proportional to 18,989 and 28,329 is: 42,263.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,989 : 28,329 = 28,329 : x
  2. Step 2: Convert to fraction form
    18,989/28,329 = 28,329/x
  3. Step 3: Cross multiply
    18,989x = 28,329 × 28,329
  4. Step 4: Simplify right side
    18,989x = 802,532,241
  5. Step 5: Solve for x
    x = 802,532,241/18,989
  6. Step 6: Final answer
    x = 42,263.01

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.