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Finding the Third Proportional to 13,990 and 21,119.75

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Solution

The third proportional to 13,990 and 21,119.75 is: 31,883.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,990 : 21,119.75 = 21,119.75 : x
  2. Step 2: Convert to fraction form
    13,990/21,119.75 = 21,119.75/x
  3. Step 3: Cross multiply
    13,990x = 21,119.75 × 21,119.75
  4. Step 4: Simplify right side
    13,990x = 446,043,840.06
  5. Step 5: Solve for x
    x = 446,043,840.06/13,990
  6. Step 6: Final answer
    x = 31,883.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.