Home / 7,204.80-9,945.10-4,221.60

Finding the Fourth Proportional to 7,204.80, 9,945.10 and 4,221.60

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Solution

The fourth proportional to 7,204.80, 9,945.10 and 4,221.60 is: 5,827.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,204.80 : 9,945.10 = 4,221.60 : x
  2. Step 2: Convert to fraction form
    7,204.80/9,945.10 = 4,221.60/x
  3. Step 3: Cross multiply
    7,204.80x = 9,945.10 × 4,221.60
  4. Step 4: Simplify right side
    7,204.80x = 41,984,173.88
  5. Step 5: Solve for x
    x = 41,984,173.88/7,204.80
  6. Step 6: Final answer
    x = 5,827.25

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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.