Home / 12,878.99-19,321.25-3,994.13

Finding the Fourth Proportional to 12,878.99, 19,321.25 and 3,994.13

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Solution

The fourth proportional to 12,878.99, 19,321.25 and 3,994.13 is: 5,992.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,878.99 : 19,321.25 = 3,994.13 : x
  2. Step 2: Convert to fraction form
    12,878.99/19,321.25 = 3,994.13/x
  3. Step 3: Cross multiply
    12,878.99x = 19,321.25 × 3,994.13
  4. Step 4: Simplify right side
    12,878.99x = 77,171,467.69
  5. Step 5: Solve for x
    x = 77,171,467.69/12,878.99
  6. Step 6: Final answer
    x = 5,992.05

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Double scale
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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.