Home / 5,639.21-7,783.67-3,281.80

Finding the Fourth Proportional to 5,639.21, 7,783.67 and 3,281.80

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Solution

The fourth proportional to 5,639.21, 7,783.67 and 3,281.80 is: 4,529.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,639.21 : 7,783.67 = 3,281.80 : x
  2. Step 2: Convert to fraction form
    5,639.21/7,783.67 = 3,281.80/x
  3. Step 3: Cross multiply
    5,639.21x = 7,783.67 × 3,281.80
  4. Step 4: Simplify right side
    5,639.21x = 25,544,431.80
  5. Step 5: Solve for x
    x = 25,544,431.80/5,639.21
  6. Step 6: Final answer
    x = 4,529.79

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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.