Home / 2,131.26-2,943.60-1,421.87

Finding the Fourth Proportional to 2,131.26, 2,943.60 and 1,421.87

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Solution

The fourth proportional to 2,131.26, 2,943.60 and 1,421.87 is: 1,963.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,131.26 : 2,943.60 = 1,421.87 : x
  2. Step 2: Convert to fraction form
    2,131.26/2,943.60 = 1,421.87/x
  3. Step 3: Cross multiply
    2,131.26x = 2,943.60 × 1,421.87
  4. Step 4: Simplify right side
    2,131.26x = 4,185,416.53
  5. Step 5: Solve for x
    x = 4,185,416.53/2,131.26
  6. Step 6: Final answer
    x = 1,963.82

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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.