Home / 11,319.90-16,980.60-2,999.80

Finding the Fourth Proportional to 11,319.90, 16,980.60 and 2,999.80

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Solution

The fourth proportional to 11,319.90, 16,980.60 and 2,999.80 is: 4,499.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,319.90 : 16,980.60 = 2,999.80 : x
  2. Step 2: Convert to fraction form
    11,319.90/16,980.60 = 2,999.80/x
  3. Step 3: Cross multiply
    11,319.90x = 16,980.60 × 2,999.80
  4. Step 4: Simplify right side
    11,319.90x = 50,938,403.88
  5. Step 5: Solve for x
    x = 50,938,403.88/11,319.90
  6. Step 6: Final answer
    x = 4,499.90

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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.