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Finding the Fourth Proportional to 10,391.70, 14,340.60 and 5,676

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Solution

The fourth proportional to 10,391.70, 14,340.60 and 5,676 is: 7,832.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,391.70 : 14,340.60 = 5,676 : x
  2. Step 2: Convert to fraction form
    10,391.70/14,340.60 = 5,676/x
  3. Step 3: Cross multiply
    10,391.70x = 14,340.60 × 5,676
  4. Step 4: Simplify right side
    10,391.70x = 81,397,245.60
  5. Step 5: Solve for x
    x = 81,397,245.60/10,391.70
  6. Step 6: Final answer
    x = 7,832.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.