Home / 3,645.60-5,455.80-2,185.80

Finding the Fourth Proportional to 3,645.60, 5,455.80 and 2,185.80

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Solution

The fourth proportional to 3,645.60, 5,455.80 and 2,185.80 is: 3,271.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,645.60 : 5,455.80 = 2,185.80 : x
  2. Step 2: Convert to fraction form
    3,645.60/5,455.80 = 2,185.80/x
  3. Step 3: Cross multiply
    3,645.60x = 5,455.80 × 2,185.80
  4. Step 4: Simplify right side
    3,645.60x = 11,925,287.64
  5. Step 5: Solve for x
    x = 11,925,287.64/3,645.60
  6. Step 6: Final answer
    x = 3,271.15

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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.