Home / 13,181.85-19,772.79-3,321.23

Finding the Fourth Proportional to 13,181.85, 19,772.79 and 3,321.23

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Solution

The fourth proportional to 13,181.85, 19,772.79 and 3,321.23 is: 4,981.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,181.85 : 19,772.79 = 3,321.23 : x
  2. Step 2: Convert to fraction form
    13,181.85/19,772.79 = 3,321.23/x
  3. Step 3: Cross multiply
    13,181.85x = 19,772.79 × 3,321.23
  4. Step 4: Simplify right side
    13,181.85x = 65,669,884.47
  5. Step 5: Solve for x
    x = 65,669,884.47/13,181.85
  6. Step 6: Final answer
    x = 4,981.84

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.