Home / 2,114.20-3,173.70-1,139.80

Finding the Fourth Proportional to 2,114.20, 3,173.70 and 1,139.80

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Solution

The fourth proportional to 2,114.20, 3,173.70 and 1,139.80 is: 1,710.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,114.20 : 3,173.70 = 1,139.80 : x
  2. Step 2: Convert to fraction form
    2,114.20/3,173.70 = 1,139.80/x
  3. Step 3: Cross multiply
    2,114.20x = 3,173.70 × 1,139.80
  4. Step 4: Simplify right side
    2,114.20x = 3,617,383.26
  5. Step 5: Solve for x
    x = 3,617,383.26/2,114.20
  6. Step 6: Final answer
    x = 1,710.99

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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.