Home / 3,121.63-4,681.14-1,271.49

Finding the Fourth Proportional to 3,121.63, 4,681.14 and 1,271.49

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Solution

The fourth proportional to 3,121.63, 4,681.14 and 1,271.49 is: 1,906.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.63 : 4,681.14 = 1,271.49 : x
  2. Step 2: Convert to fraction form
    3,121.63/4,681.14 = 1,271.49/x
  3. Step 3: Cross multiply
    3,121.63x = 4,681.14 × 1,271.49
  4. Step 4: Simplify right side
    3,121.63x = 5,952,022.70
  5. Step 5: Solve for x
    x = 5,952,022.70/3,121.63
  6. Step 6: Final answer
    x = 1,906.70

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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.