Home / 7,921.36-11,880.64-2,655.84

Finding the Fourth Proportional to 7,921.36, 11,880.64 and 2,655.84

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Solution

The fourth proportional to 7,921.36, 11,880.64 and 2,655.84 is: 3,983.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,921.36 : 11,880.64 = 2,655.84 : x
  2. Step 2: Convert to fraction form
    7,921.36/11,880.64 = 2,655.84/x
  3. Step 3: Cross multiply
    7,921.36x = 11,880.64 × 2,655.84
  4. Step 4: Simplify right side
    7,921.36x = 31,553,078.94
  5. Step 5: Solve for x
    x = 31,553,078.94/7,921.36
  6. Step 6: Final answer
    x = 3,983.29

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1.5x scale

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.