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Finding the Fourth Proportional to 5,123.12, 7,682.12 and 1,659.92

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Solution

The fourth proportional to 5,123.12, 7,682.12 and 1,659.92 is: 2,489.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,123.12 : 7,682.12 = 1,659.92 : x
  2. Step 2: Convert to fraction form
    5,123.12/7,682.12 = 1,659.92/x
  3. Step 3: Cross multiply
    5,123.12x = 7,682.12 × 1,659.92
  4. Step 4: Simplify right side
    5,123.12x = 12,751,704.63
  5. Step 5: Solve for x
    x = 12,751,704.63/5,123.12
  6. Step 6: Final answer
    x = 2,489.05

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1.5x scale

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.