Home / 2,101.74-3,147.75-1,126.50

Finding the Fourth Proportional to 2,101.74, 3,147.75 and 1,126.50

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Solution

The fourth proportional to 2,101.74, 3,147.75 and 1,126.50 is: 1,687.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,101.74 : 3,147.75 = 1,126.50 : x
  2. Step 2: Convert to fraction form
    2,101.74/3,147.75 = 1,126.50/x
  3. Step 3: Cross multiply
    2,101.74x = 3,147.75 × 1,126.50
  4. Step 4: Simplify right side
    2,101.74x = 3,545,940.38
  5. Step 5: Solve for x
    x = 3,545,940.38/2,101.74
  6. Step 6: Final answer
    x = 1,687.15

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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.