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Finding the Third Proportional to 18,643.50 and 28,518.75

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Solution

The third proportional to 18,643.50 and 28,518.75 is: 43,624.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,643.50 : 28,518.75 = 28,518.75 : x
  2. Step 2: Convert to fraction form
    18,643.50/28,518.75 = 28,518.75/x
  3. Step 3: Cross multiply
    18,643.50x = 28,518.75 × 28,518.75
  4. Step 4: Simplify right side
    18,643.50x = 813,319,101.56
  5. Step 5: Solve for x
    x = 813,319,101.56/18,643.50
  6. Step 6: Final answer
    x = 43,624.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.