Home / 3,783.76-5,221.28-2,190.48

Finding the Fourth Proportional to 3,783.76, 5,221.28 and 2,190.48

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Solution

The fourth proportional to 3,783.76, 5,221.28 and 2,190.48 is: 3,022.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,783.76 : 5,221.28 = 2,190.48 : x
  2. Step 2: Convert to fraction form
    3,783.76/5,221.28 = 2,190.48/x
  3. Step 3: Cross multiply
    3,783.76x = 5,221.28 × 2,190.48
  4. Step 4: Simplify right side
    3,783.76x = 11,437,109.41
  5. Step 5: Solve for x
    x = 11,437,109.41/3,783.76
  6. Step 6: Final answer
    x = 3,022.68

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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.