Home / 8,114.36-12,172.26-2,921.72

Finding the Fourth Proportional to 8,114.36, 12,172.26 and 2,921.72

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Solution

The fourth proportional to 8,114.36, 12,172.26 and 2,921.72 is: 4,382.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,114.36 : 12,172.26 = 2,921.72 : x
  2. Step 2: Convert to fraction form
    8,114.36/12,172.26 = 2,921.72/x
  3. Step 3: Cross multiply
    8,114.36x = 12,172.26 × 2,921.72
  4. Step 4: Simplify right side
    8,114.36x = 35,563,935.49
  5. Step 5: Solve for x
    x = 35,563,935.49/8,114.36
  6. Step 6: Final answer
    x = 4,382.84

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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.