Home / 7,200.21-9,936.44-4,218.19

Finding the Fourth Proportional to 7,200.21, 9,936.44 and 4,218.19

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Solution

The fourth proportional to 7,200.21, 9,936.44 and 4,218.19 is: 5,821.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,200.21 : 9,936.44 = 4,218.19 : x
  2. Step 2: Convert to fraction form
    7,200.21/9,936.44 = 4,218.19/x
  3. Step 3: Cross multiply
    7,200.21x = 9,936.44 × 4,218.19
  4. Step 4: Simplify right side
    7,200.21x = 41,913,791.84
  5. Step 5: Solve for x
    x = 41,913,791.84/7,200.21
  6. Step 6: Final answer
    x = 5,821.19

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Half scale
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Double scale
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Similar ratio
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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.