Home / 3,487.05-4,812.12-1,995.21

Finding the Fourth Proportional to 3,487.05, 4,812.12 and 1,995.21

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Solution

The fourth proportional to 3,487.05, 4,812.12 and 1,995.21 is: 2,753.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,487.05 : 4,812.12 = 1,995.21 : x
  2. Step 2: Convert to fraction form
    3,487.05/4,812.12 = 1,995.21/x
  3. Step 3: Cross multiply
    3,487.05x = 4,812.12 × 1,995.21
  4. Step 4: Simplify right side
    3,487.05x = 9,601,189.95
  5. Step 5: Solve for x
    x = 9,601,189.95/3,487.05
  6. Step 6: Final answer
    x = 2,753.38

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Half scale
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Double scale
Find fourth proportional to 3,488.05, 4,813.50 and 1,996.21
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.