Home / 5,205.28-7,810.80-2,129.44

Finding the Fourth Proportional to 5,205.28, 7,810.80 and 2,129.44

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Solution

The fourth proportional to 5,205.28, 7,810.80 and 2,129.44 is: 3,195.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,205.28 : 7,810.80 = 2,129.44 : x
  2. Step 2: Convert to fraction form
    5,205.28/7,810.80 = 2,129.44/x
  3. Step 3: Cross multiply
    5,205.28x = 7,810.80 × 2,129.44
  4. Step 4: Simplify right side
    5,205.28x = 16,632,629.95
  5. Step 5: Solve for x
    x = 16,632,629.95/5,205.28
  6. Step 6: Final answer
    x = 3,195.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.