Home / 6,429.20-9,636.60-3,657.20

Finding the Fourth Proportional to 6,429.20, 9,636.60 and 3,657.20

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Solution

The fourth proportional to 6,429.20, 9,636.60 and 3,657.20 is: 5,481.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,429.20 : 9,636.60 = 3,657.20 : x
  2. Step 2: Convert to fraction form
    6,429.20/9,636.60 = 3,657.20/x
  3. Step 3: Cross multiply
    6,429.20x = 9,636.60 × 3,657.20
  4. Step 4: Simplify right side
    6,429.20x = 35,242,973.52
  5. Step 5: Solve for x
    x = 35,242,973.52/6,429.20
  6. Step 6: Final answer
    x = 5,481.70

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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.