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Finding the Fourth Proportional to 13,649.99, 18,840.60 and 7,984.44

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Solution

The fourth proportional to 13,649.99, 18,840.60 and 7,984.44 is: 11,020.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,649.99 : 18,840.60 = 7,984.44 : x
  2. Step 2: Convert to fraction form
    13,649.99/18,840.60 = 7,984.44/x
  3. Step 3: Cross multiply
    13,649.99x = 18,840.60 × 7,984.44
  4. Step 4: Simplify right side
    13,649.99x = 150,431,640.26
  5. Step 5: Solve for x
    x = 150,431,640.26/13,649.99
  6. Step 6: Final answer
    x = 11,020.65

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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.