Home / 20,189.85-30,290.99-10,336.05

Finding the Fourth Proportional to 20,189.85, 30,290.99 and 10,336.05

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Solution

The fourth proportional to 20,189.85, 30,290.99 and 10,336.05 is: 15,507.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,189.85 : 30,290.99 = 10,336.05 : x
  2. Step 2: Convert to fraction form
    20,189.85/30,290.99 = 10,336.05/x
  3. Step 3: Cross multiply
    20,189.85x = 30,290.99 × 10,336.05
  4. Step 4: Simplify right side
    20,189.85x = 313,089,135.51
  5. Step 5: Solve for x
    x = 313,089,135.51/20,189.85
  6. Step 6: Final answer
    x = 15,507.25

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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.