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Finding the Fourth Proportional to 12,809.80, 19,212.70 and 4,046.84

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Solution

The fourth proportional to 12,809.80, 19,212.70 and 4,046.84 is: 6,069.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,809.80 : 19,212.70 = 4,046.84 : x
  2. Step 2: Convert to fraction form
    12,809.80/19,212.70 = 4,046.84/x
  3. Step 3: Cross multiply
    12,809.80x = 19,212.70 × 4,046.84
  4. Step 4: Simplify right side
    12,809.80x = 77,750,722.87
  5. Step 5: Solve for x
    x = 77,750,722.87/12,809.80
  6. Step 6: Final answer
    x = 6,069.63

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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.