Home / 2,129.19-3,195.72-1,089.91

Finding the Fourth Proportional to 2,129.19, 3,195.72 and 1,089.91

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Solution

The fourth proportional to 2,129.19, 3,195.72 and 1,089.91 is: 1,635.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,129.19 : 3,195.72 = 1,089.91 : x
  2. Step 2: Convert to fraction form
    2,129.19/3,195.72 = 1,089.91/x
  3. Step 3: Cross multiply
    2,129.19x = 3,195.72 × 1,089.91
  4. Step 4: Simplify right side
    2,129.19x = 3,483,047.19
  5. Step 5: Solve for x
    x = 3,483,047.19/2,129.19
  6. Step 6: Final answer
    x = 1,635.86

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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.