Home / 7,890.54-11,816.34-6,120.80

Finding the Fourth Proportional to 7,890.54, 11,816.34 and 6,120.80

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Solution

The fourth proportional to 7,890.54, 11,816.34 and 6,120.80 is: 9,166.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,890.54 : 11,816.34 = 6,120.80 : x
  2. Step 2: Convert to fraction form
    7,890.54/11,816.34 = 6,120.80/x
  3. Step 3: Cross multiply
    7,890.54x = 11,816.34 × 6,120.80
  4. Step 4: Simplify right side
    7,890.54x = 72,325,453.87
  5. Step 5: Solve for x
    x = 72,325,453.87/7,890.54
  6. Step 6: Final answer
    x = 9,166.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.