Home / 13,188.92-18,205.66-7,881.80

Finding the Fourth Proportional to 13,188.92, 18,205.66 and 7,881.80

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Solution

The fourth proportional to 13,188.92, 18,205.66 and 7,881.80 is: 10,879.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,188.92 : 18,205.66 = 7,881.80 : x
  2. Step 2: Convert to fraction form
    13,188.92/18,205.66 = 7,881.80/x
  3. Step 3: Cross multiply
    13,188.92x = 18,205.66 × 7,881.80
  4. Step 4: Simplify right side
    13,188.92x = 143,493,370.99
  5. Step 5: Solve for x
    x = 143,493,370.99/13,188.92
  6. Step 6: Final answer
    x = 10,879.84

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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.