Home / 3,100.86-4,277.25-1,905.21

Finding the Fourth Proportional to 3,100.86, 4,277.25 and 1,905.21

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Solution

The fourth proportional to 3,100.86, 4,277.25 and 1,905.21 is: 2,628.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,100.86 : 4,277.25 = 1,905.21 : x
  2. Step 2: Convert to fraction form
    3,100.86/4,277.25 = 1,905.21/x
  3. Step 3: Cross multiply
    3,100.86x = 4,277.25 × 1,905.21
  4. Step 4: Simplify right side
    3,100.86x = 8,149,059.47
  5. Step 5: Solve for x
    x = 8,149,059.47/3,100.86
  6. Step 6: Final answer
    x = 2,628.00

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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.