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Finding the Fourth Proportional to 7,957.61, 11,939.79 and 4,258.88

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Solution

The fourth proportional to 7,957.61, 11,939.79 and 4,258.88 is: 6,390.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,957.61 : 11,939.79 = 4,258.88 : x
  2. Step 2: Convert to fraction form
    7,957.61/11,939.79 = 4,258.88/x
  3. Step 3: Cross multiply
    7,957.61x = 11,939.79 × 4,258.88
  4. Step 4: Simplify right side
    7,957.61x = 50,850,051.84
  5. Step 5: Solve for x
    x = 50,850,051.84/7,957.61
  6. Step 6: Final answer
    x = 6,390.12

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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.