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Finding the Fourth Proportional to 5,660.76, 7,811.48 and 3,142.88

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Solution

The fourth proportional to 5,660.76, 7,811.48 and 3,142.88 is: 4,336.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,660.76 : 7,811.48 = 3,142.88 : x
  2. Step 2: Convert to fraction form
    5,660.76/7,811.48 = 3,142.88/x
  3. Step 3: Cross multiply
    5,660.76x = 7,811.48 × 3,142.88
  4. Step 4: Simplify right side
    5,660.76x = 24,550,489.49
  5. Step 5: Solve for x
    x = 24,550,489.49/5,660.76
  6. Step 6: Final answer
    x = 4,336.96

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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.