Home / 2,129.21-3,195.74-1,089.93

Finding the Fourth Proportional to 2,129.21, 3,195.74 and 1,089.93

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Solution

The fourth proportional to 2,129.21, 3,195.74 and 1,089.93 is: 1,635.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,129.21 : 3,195.74 = 1,089.93 : x
  2. Step 2: Convert to fraction form
    2,129.21/3,195.74 = 1,089.93/x
  3. Step 3: Cross multiply
    2,129.21x = 3,195.74 × 1,089.93
  4. Step 4: Simplify right side
    2,129.21x = 3,483,132.90
  5. Step 5: Solve for x
    x = 3,483,132.90/2,129.21
  6. Step 6: Final answer
    x = 1,635.88

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1.5x scale

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.