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Finding the Fourth Proportional to 5,703.76, 7,871.11 and 3,185.91

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Solution

The fourth proportional to 5,703.76, 7,871.11 and 3,185.91 is: 4,396.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,703.76 : 7,871.11 = 3,185.91 : x
  2. Step 2: Convert to fraction form
    5,703.76/7,871.11 = 3,185.91/x
  3. Step 3: Cross multiply
    5,703.76x = 7,871.11 × 3,185.91
  4. Step 4: Simplify right side
    5,703.76x = 25,076,628.32
  5. Step 5: Solve for x
    x = 25,076,628.32/5,703.76
  6. Step 6: Final answer
    x = 4,396.51

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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.