Home / 12,786.99-19,169.19-4,990.35

Finding the Fourth Proportional to 12,786.99, 19,169.19 and 4,990.35

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Solution

The fourth proportional to 12,786.99, 19,169.19 and 4,990.35 is: 7,481.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,786.99 : 19,169.19 = 4,990.35 : x
  2. Step 2: Convert to fraction form
    12,786.99/19,169.19 = 4,990.35/x
  3. Step 3: Cross multiply
    12,786.99x = 19,169.19 × 4,990.35
  4. Step 4: Simplify right side
    12,786.99x = 95,660,967.32
  5. Step 5: Solve for x
    x = 95,660,967.32/12,786.99
  6. Step 6: Final answer
    x = 7,481.12

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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.