Home / 5,220.20-7,200.16-3,231.70

Finding the Fourth Proportional to 5,220.20, 7,200.16 and 3,231.70

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Solution

The fourth proportional to 5,220.20, 7,200.16 and 3,231.70 is: 4,457.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,220.20 : 7,200.16 = 3,231.70 : x
  2. Step 2: Convert to fraction form
    5,220.20/7,200.16 = 3,231.70/x
  3. Step 3: Cross multiply
    5,220.20x = 7,200.16 × 3,231.70
  4. Step 4: Simplify right side
    5,220.20x = 23,268,757.07
  5. Step 5: Solve for x
    x = 23,268,757.07/5,220.20
  6. Step 6: Final answer
    x = 4,457.45

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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.