Home / 4,609.31-6,909.81-3,129.03

Finding the Fourth Proportional to 4,609.31, 6,909.81 and 3,129.03

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Solution

The fourth proportional to 4,609.31, 6,909.81 and 3,129.03 is: 4,690.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,609.31 : 6,909.81 = 3,129.03 : x
  2. Step 2: Convert to fraction form
    4,609.31/6,909.81 = 3,129.03/x
  3. Step 3: Cross multiply
    4,609.31x = 6,909.81 × 3,129.03
  4. Step 4: Simplify right side
    4,609.31x = 21,621,002.78
  5. Step 5: Solve for x
    x = 21,621,002.78/4,609.31
  6. Step 6: Final answer
    x = 4,690.72

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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.