Home / 13,137.12-18,117.36-8,659.44

Finding the Fourth Proportional to 13,137.12, 18,117.36 and 8,659.44

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Solution

The fourth proportional to 13,137.12, 18,117.36 and 8,659.44 is: 11,942.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,137.12 : 18,117.36 = 8,659.44 : x
  2. Step 2: Convert to fraction form
    13,137.12/18,117.36 = 8,659.44/x
  3. Step 3: Cross multiply
    13,137.12x = 18,117.36 × 8,659.44
  4. Step 4: Simplify right side
    13,137.12x = 156,886,191.88
  5. Step 5: Solve for x
    x = 156,886,191.88/13,137.12
  6. Step 6: Final answer
    x = 11,942.21

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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.