Home / 2,139.50-3,203.90-1,357.14

Finding the Fourth Proportional to 2,139.50, 3,203.90 and 1,357.14

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Solution

The fourth proportional to 2,139.50, 3,203.90 and 1,357.14 is: 2,032.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,139.50 : 3,203.90 = 1,357.14 : x
  2. Step 2: Convert to fraction form
    2,139.50/3,203.90 = 1,357.14/x
  3. Step 3: Cross multiply
    2,139.50x = 3,203.90 × 1,357.14
  4. Step 4: Simplify right side
    2,139.50x = 4,348,140.85
  5. Step 5: Solve for x
    x = 4,348,140.85/2,139.50
  6. Step 6: Final answer
    x = 2,032.32

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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.