Home / 13,220.83-18,237.38-8,181.84

Finding the Fourth Proportional to 13,220.83, 18,237.38 and 8,181.84

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Solution

The fourth proportional to 13,220.83, 18,237.38 and 8,181.84 is: 11,286.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,220.83 : 18,237.38 = 8,181.84 : x
  2. Step 2: Convert to fraction form
    13,220.83/18,237.38 = 8,181.84/x
  3. Step 3: Cross multiply
    13,220.83x = 18,237.38 × 8,181.84
  4. Step 4: Simplify right side
    13,220.83x = 149,215,325.18
  5. Step 5: Solve for x
    x = 149,215,325.18/13,220.83
  6. Step 6: Final answer
    x = 11,286.38

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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.