Home / 8,055.36-12,087.90-3,128.40

Finding the Fourth Proportional to 8,055.36, 12,087.90 and 3,128.40

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Solution

The fourth proportional to 8,055.36, 12,087.90 and 3,128.40 is: 4,694.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,055.36 : 12,087.90 = 3,128.40 : x
  2. Step 2: Convert to fraction form
    8,055.36/12,087.90 = 3,128.40/x
  3. Step 3: Cross multiply
    8,055.36x = 12,087.90 × 3,128.40
  4. Step 4: Simplify right side
    8,055.36x = 37,815,786.36
  5. Step 5: Solve for x
    x = 37,815,786.36/8,055.36
  6. Step 6: Final answer
    x = 4,694.49

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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.