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Finding the Fourth Proportional to 19,072.08, 28,608.12 and 7,984.08

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Solution

The fourth proportional to 19,072.08, 28,608.12 and 7,984.08 is: 11,976.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,072.08 : 28,608.12 = 7,984.08 : x
  2. Step 2: Convert to fraction form
    19,072.08/28,608.12 = 7,984.08/x
  3. Step 3: Cross multiply
    19,072.08x = 28,608.12 × 7,984.08
  4. Step 4: Simplify right side
    19,072.08x = 228,409,518.73
  5. Step 5: Solve for x
    x = 228,409,518.73/19,072.08
  6. Step 6: Final answer
    x = 11,976.12

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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.