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Finding the Fourth Proportional to 12,806.70, 19,212.73 and 4,486.99

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Solution

The fourth proportional to 12,806.70, 19,212.73 and 4,486.99 is: 6,731.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,806.70 : 19,212.73 = 4,486.99 : x
  2. Step 2: Convert to fraction form
    12,806.70/19,212.73 = 4,486.99/x
  3. Step 3: Cross multiply
    12,806.70x = 19,212.73 × 4,486.99
  4. Step 4: Simplify right side
    12,806.70x = 86,207,327.38
  5. Step 5: Solve for x
    x = 86,207,327.38/12,806.70
  6. Step 6: Final answer
    x = 6,731.42

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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.