Home / 12,080.64-18,120.36-3,315.60

Finding the Fourth Proportional to 12,080.64, 18,120.36 and 3,315.60

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Solution

The fourth proportional to 12,080.64, 18,120.36 and 3,315.60 is: 4,973.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,080.64 : 18,120.36 = 3,315.60 : x
  2. Step 2: Convert to fraction form
    12,080.64/18,120.36 = 3,315.60/x
  3. Step 3: Cross multiply
    12,080.64x = 18,120.36 × 3,315.60
  4. Step 4: Simplify right side
    12,080.64x = 60,079,865.62
  5. Step 5: Solve for x
    x = 60,079,865.62/12,080.64
  6. Step 6: Final answer
    x = 4,973.24

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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.