Home / 20,135.40-30,213.90-8,449.80

Finding the Fourth Proportional to 20,135.40, 30,213.90 and 8,449.80

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Solution

The fourth proportional to 20,135.40, 30,213.90 and 8,449.80 is: 12,679.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,135.40 : 30,213.90 = 8,449.80 : x
  2. Step 2: Convert to fraction form
    20,135.40/30,213.90 = 8,449.80/x
  3. Step 3: Cross multiply
    20,135.40x = 30,213.90 × 8,449.80
  4. Step 4: Simplify right side
    20,135.40x = 255,301,412.22
  5. Step 5: Solve for x
    x = 255,301,412.22/20,135.40
  6. Step 6: Final answer
    x = 12,679.23

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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.