Home / 3,121.47-4,661.64-2,777.02

Finding the Fourth Proportional to 3,121.47, 4,661.64 and 2,777.02

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Solution

The fourth proportional to 3,121.47, 4,661.64 and 2,777.02 is: 4,147.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.47 : 4,661.64 = 2,777.02 : x
  2. Step 2: Convert to fraction form
    3,121.47/4,661.64 = 2,777.02/x
  3. Step 3: Cross multiply
    3,121.47x = 4,661.64 × 2,777.02
  4. Step 4: Simplify right side
    3,121.47x = 12,945,467.51
  5. Step 5: Solve for x
    x = 12,945,467.51/3,121.47
  6. Step 6: Final answer
    x = 4,147.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.