Home / 3,421.60-5,132.40-2,109.40

Finding the Fourth Proportional to 3,421.60, 5,132.40 and 2,109.40

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Solution

The fourth proportional to 3,421.60, 5,132.40 and 2,109.40 is: 3,164.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,421.60 : 5,132.40 = 2,109.40 : x
  2. Step 2: Convert to fraction form
    3,421.60/5,132.40 = 2,109.40/x
  3. Step 3: Cross multiply
    3,421.60x = 5,132.40 × 2,109.40
  4. Step 4: Simplify right side
    3,421.60x = 10,826,284.56
  5. Step 5: Solve for x
    x = 10,826,284.56/3,421.60
  6. Step 6: Final answer
    x = 3,164.10

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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.