Home / 3,109.02-4,289.60-2,163.75

Finding the Fourth Proportional to 3,109.02, 4,289.60 and 2,163.75

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Solution

The fourth proportional to 3,109.02, 4,289.60 and 2,163.75 is: 2,985.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,109.02 : 4,289.60 = 2,163.75 : x
  2. Step 2: Convert to fraction form
    3,109.02/4,289.60 = 2,163.75/x
  3. Step 3: Cross multiply
    3,109.02x = 4,289.60 × 2,163.75
  4. Step 4: Simplify right side
    3,109.02x = 9,281,611.18
  5. Step 5: Solve for x
    x = 9,281,611.18/3,109.02
  6. Step 6: Final answer
    x = 2,985.38

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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.