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Finding the Fourth Proportional to 5,696.79, 7,861.64 and 3,212.79

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Solution

The fourth proportional to 5,696.79, 7,861.64 and 3,212.79 is: 4,433.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,696.79 : 7,861.64 = 3,212.79 : x
  2. Step 2: Convert to fraction form
    5,696.79/7,861.64 = 3,212.79/x
  3. Step 3: Cross multiply
    5,696.79x = 7,861.64 × 3,212.79
  4. Step 4: Simplify right side
    5,696.79x = 25,257,782.31
  5. Step 5: Solve for x
    x = 25,257,782.31/5,696.79
  6. Step 6: Final answer
    x = 4,433.69

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1.5x scale

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.