Home / 20,195.40-30,260.70-13,261.80

Finding the Fourth Proportional to 20,195.40, 30,260.70 and 13,261.80

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Solution

The fourth proportional to 20,195.40, 30,260.70 and 13,261.80 is: 19,871.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,195.40 : 30,260.70 = 13,261.80 : x
  2. Step 2: Convert to fraction form
    20,195.40/30,260.70 = 13,261.80/x
  3. Step 3: Cross multiply
    20,195.40x = 30,260.70 × 13,261.80
  4. Step 4: Simplify right side
    20,195.40x = 401,311,351.26
  5. Step 5: Solve for x
    x = 401,311,351.26/20,195.40
  6. Step 6: Final answer
    x = 19,871.42

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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.