Home / 13,608.36-18,777.42-7,638.89

Finding the Fourth Proportional to 13,608.36, 18,777.42 and 7,638.89

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Solution

The fourth proportional to 13,608.36, 18,777.42 and 7,638.89 is: 10,540.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,608.36 : 18,777.42 = 7,638.89 : x
  2. Step 2: Convert to fraction form
    13,608.36/18,777.42 = 7,638.89/x
  3. Step 3: Cross multiply
    13,608.36x = 18,777.42 × 7,638.89
  4. Step 4: Simplify right side
    13,608.36x = 143,438,551.98
  5. Step 5: Solve for x
    x = 143,438,551.98/13,608.36
  6. Step 6: Final answer
    x = 10,540.47

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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.