Home / 13,161.90-18,150.86-8,617.80

Finding the Fourth Proportional to 13,161.90, 18,150.86 and 8,617.80

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Solution

The fourth proportional to 13,161.90, 18,150.86 and 8,617.80 is: 11,884.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,161.90 : 18,150.86 = 8,617.80 : x
  2. Step 2: Convert to fraction form
    13,161.90/18,150.86 = 8,617.80/x
  3. Step 3: Cross multiply
    13,161.90x = 18,150.86 × 8,617.80
  4. Step 4: Simplify right side
    13,161.90x = 156,420,438.22
  5. Step 5: Solve for x
    x = 156,420,438.22/13,161.90
  6. Step 6: Final answer
    x = 11,884.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.