Home / 7,921.72-11,882.60-2,078.32

Finding the Fourth Proportional to 7,921.72, 11,882.60 and 2,078.32

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Solution

The fourth proportional to 7,921.72, 11,882.60 and 2,078.32 is: 3,117.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,921.72 : 11,882.60 = 2,078.32 : x
  2. Step 2: Convert to fraction form
    7,921.72/11,882.60 = 2,078.32/x
  3. Step 3: Cross multiply
    7,921.72x = 11,882.60 × 2,078.32
  4. Step 4: Simplify right side
    7,921.72x = 24,695,845.23
  5. Step 5: Solve for x
    x = 24,695,845.23/7,921.72
  6. Step 6: Final answer
    x = 3,117.49

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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.