Home / 2,130.80-3,177.38-1,871.86

Finding the Fourth Proportional to 2,130.80, 3,177.38 and 1,871.86

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Solution

The fourth proportional to 2,130.80, 3,177.38 and 1,871.86 is: 2,791.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,130.80 : 3,177.38 = 1,871.86 : x
  2. Step 2: Convert to fraction form
    2,130.80/3,177.38 = 1,871.86/x
  3. Step 3: Cross multiply
    2,130.80x = 3,177.38 × 1,871.86
  4. Step 4: Simplify right side
    2,130.80x = 5,947,610.53
  5. Step 5: Solve for x
    x = 5,947,610.53/2,130.80
  6. Step 6: Final answer
    x = 2,791.26

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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.