Home / 5,181.20-7,771.66-1,285.56

Finding the Fourth Proportional to 5,181.20, 7,771.66 and 1,285.56

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Solution

The fourth proportional to 5,181.20, 7,771.66 and 1,285.56 is: 1,928.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,181.20 : 7,771.66 = 1,285.56 : x
  2. Step 2: Convert to fraction form
    5,181.20/7,771.66 = 1,285.56/x
  3. Step 3: Cross multiply
    5,181.20x = 7,771.66 × 1,285.56
  4. Step 4: Simplify right side
    5,181.20x = 9,990,935.23
  5. Step 5: Solve for x
    x = 9,990,935.23/5,181.20
  6. Step 6: Final answer
    x = 1,928.31

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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.