Home / 12,976.40-19,474.20-5,190.80

Finding the Fourth Proportional to 12,976.40, 19,474.20 and 5,190.80

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Solution

The fourth proportional to 12,976.40, 19,474.20 and 5,190.80 is: 7,790.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,976.40 : 19,474.20 = 5,190.80 : x
  2. Step 2: Convert to fraction form
    12,976.40/19,474.20 = 5,190.80/x
  3. Step 3: Cross multiply
    12,976.40x = 19,474.20 × 5,190.80
  4. Step 4: Simplify right side
    12,976.40x = 101,086,677.36
  5. Step 5: Solve for x
    x = 101,086,677.36/12,976.40
  6. Step 6: Final answer
    x = 7,790.04

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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.