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Finding the Fourth Proportional to 5,206.80, 7,811.80 and 4,111.60

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Solution

The fourth proportional to 5,206.80, 7,811.80 and 4,111.60 is: 6,168.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,206.80 : 7,811.80 = 4,111.60 : x
  2. Step 2: Convert to fraction form
    5,206.80/7,811.80 = 4,111.60/x
  3. Step 3: Cross multiply
    5,206.80x = 7,811.80 × 4,111.60
  4. Step 4: Simplify right side
    5,206.80x = 32,118,996.88
  5. Step 5: Solve for x
    x = 32,118,996.88/5,206.80
  6. Step 6: Final answer
    x = 6,168.66

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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.