Home / 12,739.95-19,109.93-3,974.87

Finding the Fourth Proportional to 12,739.95, 19,109.93 and 3,974.87

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Solution

The fourth proportional to 12,739.95, 19,109.93 and 3,974.87 is: 5,962.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,739.95 : 19,109.93 = 3,974.87 : x
  2. Step 2: Convert to fraction form
    12,739.95/19,109.93 = 3,974.87/x
  3. Step 3: Cross multiply
    12,739.95x = 19,109.93 × 3,974.87
  4. Step 4: Simplify right side
    12,739.95x = 75,959,515.36
  5. Step 5: Solve for x
    x = 75,959,515.36/12,739.95
  6. Step 6: Final answer
    x = 5,962.31

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Similar ratio
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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.