Home / 5,639.84-7,782.80-3,963.68

Finding the Fourth Proportional to 5,639.84, 7,782.80 and 3,963.68

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Solution

The fourth proportional to 5,639.84, 7,782.80 and 3,963.68 is: 5,469.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,639.84 : 7,782.80 = 3,963.68 : x
  2. Step 2: Convert to fraction form
    5,639.84/7,782.80 = 3,963.68/x
  3. Step 3: Cross multiply
    5,639.84x = 7,782.80 × 3,963.68
  4. Step 4: Simplify right side
    5,639.84x = 30,848,528.70
  5. Step 5: Solve for x
    x = 30,848,528.70/5,639.84
  6. Step 6: Final answer
    x = 5,469.75

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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.