Home / 3,100.14-4,277.61-1,921.50

Finding the Fourth Proportional to 3,100.14, 4,277.61 and 1,921.50

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Solution

The fourth proportional to 3,100.14, 4,277.61 and 1,921.50 is: 2,651.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,100.14 : 4,277.61 = 1,921.50 : x
  2. Step 2: Convert to fraction form
    3,100.14/4,277.61 = 1,921.50/x
  3. Step 3: Cross multiply
    3,100.14x = 4,277.61 × 1,921.50
  4. Step 4: Simplify right side
    3,100.14x = 8,219,427.62
  5. Step 5: Solve for x
    x = 8,219,427.62/3,100.14
  6. Step 6: Final answer
    x = 2,651.31

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1.5x scale

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.