Home / 13,608.09-18,777.87-7,638.59

Finding the Fourth Proportional to 13,608.09, 18,777.87 and 7,638.59

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Solution

The fourth proportional to 13,608.09, 18,777.87 and 7,638.59 is: 10,540.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,608.09 : 18,777.87 = 7,638.59 : x
  2. Step 2: Convert to fraction form
    13,608.09/18,777.87 = 7,638.59/x
  3. Step 3: Cross multiply
    13,608.09x = 18,777.87 × 7,638.59
  4. Step 4: Simplify right side
    13,608.09x = 143,436,356.11
  5. Step 5: Solve for x
    x = 143,436,356.11/13,608.09
  6. Step 6: Final answer
    x = 10,540.52

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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.