Home / 13,110.89-18,093.23-7,142.55

Finding the Fourth Proportional to 13,110.89, 18,093.23 and 7,142.55

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Solution

The fourth proportional to 13,110.89, 18,093.23 and 7,142.55 is: 9,856.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,110.89 : 18,093.23 = 7,142.55 : x
  2. Step 2: Convert to fraction form
    13,110.89/18,093.23 = 7,142.55/x
  3. Step 3: Cross multiply
    13,110.89x = 18,093.23 × 7,142.55
  4. Step 4: Simplify right side
    13,110.89x = 129,231,764.22
  5. Step 5: Solve for x
    x = 129,231,764.22/13,110.89
  6. Step 6: Final answer
    x = 9,856.83

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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.