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Finding the Fourth Proportional to 7,869.79, 11,804.73 and 2,939.39

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Solution

The fourth proportional to 7,869.79, 11,804.73 and 2,939.39 is: 4,409.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,869.79 : 11,804.73 = 2,939.39 : x
  2. Step 2: Convert to fraction form
    7,869.79/11,804.73 = 2,939.39/x
  3. Step 3: Cross multiply
    7,869.79x = 11,804.73 × 2,939.39
  4. Step 4: Simplify right side
    7,869.79x = 34,698,679.54
  5. Step 5: Solve for x
    x = 34,698,679.54/7,869.79
  6. Step 6: Final answer
    x = 4,409.10

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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.