Home / 3,989.07-5,506.72-2,855.63

Finding the Fourth Proportional to 3,989.07, 5,506.72 and 2,855.63

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Solution

The fourth proportional to 3,989.07, 5,506.72 and 2,855.63 is: 3,942.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,989.07 : 5,506.72 = 2,855.63 : x
  2. Step 2: Convert to fraction form
    3,989.07/5,506.72 = 2,855.63/x
  3. Step 3: Cross multiply
    3,989.07x = 5,506.72 × 2,855.63
  4. Step 4: Simplify right side
    3,989.07x = 15,725,140.56
  5. Step 5: Solve for x
    x = 15,725,140.56/3,989.07
  6. Step 6: Final answer
    x = 3,942.06

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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.