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Finding the Third Proportional to 20,290.50 and 31,479.75

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Solution

The third proportional to 20,290.50 and 31,479.75 is: 48,839.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,290.50 : 31,479.75 = 31,479.75 : x
  2. Step 2: Convert to fraction form
    20,290.50/31,479.75 = 31,479.75/x
  3. Step 3: Cross multiply
    20,290.50x = 31,479.75 × 31,479.75
  4. Step 4: Simplify right side
    20,290.50x = 990,974,660.06
  5. Step 5: Solve for x
    x = 990,974,660.06/20,290.50
  6. Step 6: Final answer
    x = 48,839.34

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1.5x scale

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.