Home / 13,579.75-18,741.14-7,991.83

Finding the Fourth Proportional to 13,579.75, 18,741.14 and 7,991.83

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Solution

The fourth proportional to 13,579.75, 18,741.14 and 7,991.83 is: 11,029.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,579.75 : 18,741.14 = 7,991.83 : x
  2. Step 2: Convert to fraction form
    13,579.75/18,741.14 = 7,991.83/x
  3. Step 3: Cross multiply
    13,579.75x = 18,741.14 × 7,991.83
  4. Step 4: Simplify right side
    13,579.75x = 149,776,004.89
  5. Step 5: Solve for x
    x = 149,776,004.89/13,579.75
  6. Step 6: Final answer
    x = 11,029.36

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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.