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Finding the Third Proportional to 18,987 and 28,480.50

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Solution

The third proportional to 18,987 and 28,480.50 is: 42,720.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,987 : 28,480.50 = 28,480.50 : x
  2. Step 2: Convert to fraction form
    18,987/28,480.50 = 28,480.50/x
  3. Step 3: Cross multiply
    18,987x = 28,480.50 × 28,480.50
  4. Step 4: Simplify right side
    18,987x = 811,138,880.25
  5. Step 5: Solve for x
    x = 811,138,880.25/18,987
  6. Step 6: Final answer
    x = 42,720.75

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.