Home / 3,621.95-4,998.62-2,129.12

Finding the Fourth Proportional to 3,621.95, 4,998.62 and 2,129.12

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Solution

The fourth proportional to 3,621.95, 4,998.62 and 2,129.12 is: 2,938.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,621.95 : 4,998.62 = 2,129.12 : x
  2. Step 2: Convert to fraction form
    3,621.95/4,998.62 = 2,129.12/x
  3. Step 3: Cross multiply
    3,621.95x = 4,998.62 × 2,129.12
  4. Step 4: Simplify right side
    3,621.95x = 10,642,661.81
  5. Step 5: Solve for x
    x = 10,642,661.81/3,621.95
  6. Step 6: Final answer
    x = 2,938.38

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Half scale
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Double scale
Find fourth proportional to 3,622.95, 5,000 and 2,130.12
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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.