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Finding the Third Proportional to 18,981 and 28,316.25

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Solution

The third proportional to 18,981 and 28,316.25 is: 42,242.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,981 : 28,316.25 = 28,316.25 : x
  2. Step 2: Convert to fraction form
    18,981/28,316.25 = 28,316.25/x
  3. Step 3: Cross multiply
    18,981x = 28,316.25 × 28,316.25
  4. Step 4: Simplify right side
    18,981x = 801,810,014.06
  5. Step 5: Solve for x
    x = 801,810,014.06/18,981
  6. Step 6: Final answer
    x = 42,242.77

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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.