Home / 13,120.22-18,092.18-8,638.25

Finding the Fourth Proportional to 13,120.22, 18,092.18 and 8,638.25

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Solution

The fourth proportional to 13,120.22, 18,092.18 and 8,638.25 is: 11,911.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,120.22 : 18,092.18 = 8,638.25 : x
  2. Step 2: Convert to fraction form
    13,120.22/18,092.18 = 8,638.25/x
  3. Step 3: Cross multiply
    13,120.22x = 18,092.18 × 8,638.25
  4. Step 4: Simplify right side
    13,120.22x = 156,284,705.02
  5. Step 5: Solve for x
    x = 156,284,705.02/13,120.22
  6. Step 6: Final answer
    x = 11,911.74

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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.