Home / 13,100.25-18,090.35-8,321.74

Finding the Fourth Proportional to 13,100.25, 18,090.35 and 8,321.74

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Solution

The fourth proportional to 13,100.25, 18,090.35 and 8,321.74 is: 11,491.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,100.25 : 18,090.35 = 8,321.74 : x
  2. Step 2: Convert to fraction form
    13,100.25/18,090.35 = 8,321.74/x
  3. Step 3: Cross multiply
    13,100.25x = 18,090.35 × 8,321.74
  4. Step 4: Simplify right side
    13,100.25x = 150,543,121.37
  5. Step 5: Solve for x
    x = 150,543,121.37/13,100.25
  6. Step 6: Final answer
    x = 11,491.63

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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.