Home / 3,187.10-4,780.64-2,091.21

Finding the Fourth Proportional to 3,187.10, 4,780.64 and 2,091.21

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Solution

The fourth proportional to 3,187.10, 4,780.64 and 2,091.21 is: 3,136.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,187.10 : 4,780.64 = 2,091.21 : x
  2. Step 2: Convert to fraction form
    3,187.10/4,780.64 = 2,091.21/x
  3. Step 3: Cross multiply
    3,187.10x = 4,780.64 × 2,091.21
  4. Step 4: Simplify right side
    3,187.10x = 9,997,322.17
  5. Step 5: Solve for x
    x = 9,997,322.17/3,187.10
  6. Step 6: Final answer
    x = 3,136.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.