Home / 11,420.84-17,131.26-3,100.86

Finding the Fourth Proportional to 11,420.84, 17,131.26 and 3,100.86

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Solution

The fourth proportional to 11,420.84, 17,131.26 and 3,100.86 is: 4,651.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,420.84 : 17,131.26 = 3,100.86 : x
  2. Step 2: Convert to fraction form
    11,420.84/17,131.26 = 3,100.86/x
  3. Step 3: Cross multiply
    11,420.84x = 17,131.26 × 3,100.86
  4. Step 4: Simplify right side
    11,420.84x = 53,121,638.88
  5. Step 5: Solve for x
    x = 53,121,638.88/11,420.84
  6. Step 6: Final answer
    x = 4,651.29

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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.