Home / 13,220.08-18,236.35-8,181.09

Finding the Fourth Proportional to 13,220.08, 18,236.35 and 8,181.09

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Solution

The fourth proportional to 13,220.08, 18,236.35 and 8,181.09 is: 11,285.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,220.08 : 18,236.35 = 8,181.09 : x
  2. Step 2: Convert to fraction form
    13,220.08/18,236.35 = 8,181.09/x
  3. Step 3: Cross multiply
    13,220.08x = 18,236.35 × 8,181.09
  4. Step 4: Simplify right side
    13,220.08x = 149,193,245.76
  5. Step 5: Solve for x
    x = 149,193,245.76/13,220.08
  6. Step 6: Final answer
    x = 11,285.35

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Half scale
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Double scale
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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.