Home / 5,638.20-7,782.29-3,280.80

Finding the Fourth Proportional to 5,638.20, 7,782.29 and 3,280.80

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Solution

The fourth proportional to 5,638.20, 7,782.29 and 3,280.80 is: 4,528.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,638.20 : 7,782.29 = 3,280.80 : x
  2. Step 2: Convert to fraction form
    5,638.20/7,782.29 = 3,280.80/x
  3. Step 3: Cross multiply
    5,638.20x = 7,782.29 × 3,280.80
  4. Step 4: Simplify right side
    5,638.20x = 25,532,120.63
  5. Step 5: Solve for x
    x = 25,532,120.63/5,638.20
  6. Step 6: Final answer
    x = 4,528.41

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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.