Home / 11,190.90-16,749.90-8,979.60

Finding the Fourth Proportional to 11,190.90, 16,749.90 and 8,979.60

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Solution

The fourth proportional to 11,190.90, 16,749.90 and 8,979.60 is: 13,440.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,190.90 : 16,749.90 = 8,979.60 : x
  2. Step 2: Convert to fraction form
    11,190.90/16,749.90 = 8,979.60/x
  3. Step 3: Cross multiply
    11,190.90x = 16,749.90 × 8,979.60
  4. Step 4: Simplify right side
    11,190.90x = 150,407,402.04
  5. Step 5: Solve for x
    x = 150,407,402.04/11,190.90
  6. Step 6: Final answer
    x = 13,440.15

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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.