Home / 3,164.20-4,365.90-1,985.80

Finding the Fourth Proportional to 3,164.20, 4,365.90 and 1,985.80

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Solution

The fourth proportional to 3,164.20, 4,365.90 and 1,985.80 is: 2,739.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,164.20 : 4,365.90 = 1,985.80 : x
  2. Step 2: Convert to fraction form
    3,164.20/4,365.90 = 1,985.80/x
  3. Step 3: Cross multiply
    3,164.20x = 4,365.90 × 1,985.80
  4. Step 4: Simplify right side
    3,164.20x = 8,669,804.22
  5. Step 5: Solve for x
    x = 8,669,804.22/3,164.20
  6. Step 6: Final answer
    x = 2,739.97

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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.