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Finding the Fourth Proportional to 7,921.77, 11,879.01 and 4,459.02

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Solution

The fourth proportional to 7,921.77, 11,879.01 and 4,459.02 is: 6,686.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,921.77 : 11,879.01 = 4,459.02 : x
  2. Step 2: Convert to fraction form
    7,921.77/11,879.01 = 4,459.02/x
  3. Step 3: Cross multiply
    7,921.77x = 11,879.01 × 4,459.02
  4. Step 4: Simplify right side
    7,921.77x = 52,968,743.17
  5. Step 5: Solve for x
    x = 52,968,743.17/7,921.77
  6. Step 6: Final answer
    x = 6,686.48

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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.