Home / 1,911.21-2,636.73-1,415.04

Finding the Fourth Proportional to 1,911.21, 2,636.73 and 1,415.04

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Solution

The fourth proportional to 1,911.21, 2,636.73 and 1,415.04 is: 1,952.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,911.21 : 2,636.73 = 1,415.04 : x
  2. Step 2: Convert to fraction form
    1,911.21/2,636.73 = 1,415.04/x
  3. Step 3: Cross multiply
    1,911.21x = 2,636.73 × 1,415.04
  4. Step 4: Simplify right side
    1,911.21x = 3,731,078.42
  5. Step 5: Solve for x
    x = 3,731,078.42/1,911.21
  6. Step 6: Final answer
    x = 1,952.21

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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.