Home / 13,608.01-18,777.60-7,640.33

Finding the Fourth Proportional to 13,608.01, 18,777.60 and 7,640.33

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Solution

The fourth proportional to 13,608.01, 18,777.60 and 7,640.33 is: 10,542.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,608.01 : 18,777.60 = 7,640.33 : x
  2. Step 2: Convert to fraction form
    13,608.01/18,777.60 = 7,640.33/x
  3. Step 3: Cross multiply
    13,608.01x = 18,777.60 × 7,640.33
  4. Step 4: Simplify right side
    13,608.01x = 143,467,107.55
  5. Step 5: Solve for x
    x = 143,467,107.55/13,608.01
  6. Step 6: Final answer
    x = 10,542.84

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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.