Home / 3,639.46-5,021.30-2,147.89

Finding the Fourth Proportional to 3,639.46, 5,021.30 and 2,147.89

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Solution

The fourth proportional to 3,639.46, 5,021.30 and 2,147.89 is: 2,963.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,639.46 : 5,021.30 = 2,147.89 : x
  2. Step 2: Convert to fraction form
    3,639.46/5,021.30 = 2,147.89/x
  3. Step 3: Cross multiply
    3,639.46x = 5,021.30 × 2,147.89
  4. Step 4: Simplify right side
    3,639.46x = 10,785,164.21
  5. Step 5: Solve for x
    x = 10,785,164.21/3,639.46
  6. Step 6: Final answer
    x = 2,963.40

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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.