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Finding the Fourth Proportional to 18,993.12, 28,486.62 and 6,512.64

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Solution

The fourth proportional to 18,993.12, 28,486.62 and 6,512.64 is: 9,767.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,993.12 : 28,486.62 = 6,512.64 : x
  2. Step 2: Convert to fraction form
    18,993.12/28,486.62 = 6,512.64/x
  3. Step 3: Cross multiply
    18,993.12x = 28,486.62 × 6,512.64
  4. Step 4: Simplify right side
    18,993.12x = 185,523,100.88
  5. Step 5: Solve for x
    x = 185,523,100.88/18,993.12
  6. Step 6: Final answer
    x = 9,767.91

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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.