Home / 12,720.90-19,081.26-3,955.80

Finding the Fourth Proportional to 12,720.90, 19,081.26 and 3,955.80

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Solution

The fourth proportional to 12,720.90, 19,081.26 and 3,955.80 is: 5,933.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,720.90 : 19,081.26 = 3,955.80 : x
  2. Step 2: Convert to fraction form
    12,720.90/19,081.26 = 3,955.80/x
  3. Step 3: Cross multiply
    12,720.90x = 19,081.26 × 3,955.80
  4. Step 4: Simplify right side
    12,720.90x = 75,481,648.31
  5. Step 5: Solve for x
    x = 75,481,648.31/12,720.90
  6. Step 6: Final answer
    x = 5,933.67

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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.