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Finding the Fourth Proportional to 12,805.75, 19,211.48 and 3,922.32

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Solution

The fourth proportional to 12,805.75, 19,211.48 and 3,922.32 is: 5,884.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,805.75 : 19,211.48 = 3,922.32 : x
  2. Step 2: Convert to fraction form
    12,805.75/19,211.48 = 3,922.32/x
  3. Step 3: Cross multiply
    12,805.75x = 19,211.48 × 3,922.32
  4. Step 4: Simplify right side
    12,805.75x = 75,353,572.23
  5. Step 5: Solve for x
    x = 75,353,572.23/12,805.75
  6. Step 6: Final answer
    x = 5,884.35

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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.