Home / 13,608.33-18,778.19-7,638.63

Finding the Fourth Proportional to 13,608.33, 18,778.19 and 7,638.63

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Solution

The fourth proportional to 13,608.33, 18,778.19 and 7,638.63 is: 10,540.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,608.33 : 18,778.19 = 7,638.63 : x
  2. Step 2: Convert to fraction form
    13,608.33/18,778.19 = 7,638.63/x
  3. Step 3: Cross multiply
    13,608.33x = 18,778.19 × 7,638.63
  4. Step 4: Simplify right side
    13,608.33x = 143,439,551.59
  5. Step 5: Solve for x
    x = 143,439,551.59/13,608.33
  6. Step 6: Final answer
    x = 10,540.57

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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.