Home / 20,515.36-30,771.60-11,722.72

Finding the Fourth Proportional to 20,515.36, 30,771.60 and 11,722.72

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Solution

The fourth proportional to 20,515.36, 30,771.60 and 11,722.72 is: 17,583.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,515.36 : 30,771.60 = 11,722.72 : x
  2. Step 2: Convert to fraction form
    20,515.36/30,771.60 = 11,722.72/x
  3. Step 3: Cross multiply
    20,515.36x = 30,771.60 × 11,722.72
  4. Step 4: Simplify right side
    20,515.36x = 360,726,850.75
  5. Step 5: Solve for x
    x = 360,726,850.75/20,515.36
  6. Step 6: Final answer
    x = 17,583.26

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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.