Home / 5,209.20-7,813.80-3,135.60

Finding the Fourth Proportional to 5,209.20, 7,813.80 and 3,135.60

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Solution

The fourth proportional to 5,209.20, 7,813.80 and 3,135.60 is: 4,703.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,209.20 : 7,813.80 = 3,135.60 : x
  2. Step 2: Convert to fraction form
    5,209.20/7,813.80 = 3,135.60/x
  3. Step 3: Cross multiply
    5,209.20x = 7,813.80 × 3,135.60
  4. Step 4: Simplify right side
    5,209.20x = 24,500,951.28
  5. Step 5: Solve for x
    x = 24,500,951.28/5,209.20
  6. Step 6: Final answer
    x = 4,703.40

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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.