Home / 2,739.90-3,783.15-2,109.45

Finding the Fourth Proportional to 2,739.90, 3,783.15 and 2,109.45

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Solution

The fourth proportional to 2,739.90, 3,783.15 and 2,109.45 is: 2,912.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,739.90 : 3,783.15 = 2,109.45 : x
  2. Step 2: Convert to fraction form
    2,739.90/3,783.15 = 2,109.45/x
  3. Step 3: Cross multiply
    2,739.90x = 3,783.15 × 2,109.45
  4. Step 4: Simplify right side
    2,739.90x = 7,980,365.77
  5. Step 5: Solve for x
    x = 7,980,365.77/2,739.90
  6. Step 6: Final answer
    x = 2,912.65

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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.