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Finding the Fourth Proportional to 5,115.49, 7,672.92 and 1,828.42

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Solution

The fourth proportional to 5,115.49, 7,672.92 and 1,828.42 is: 2,742.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,115.49 : 7,672.92 = 1,828.42 : x
  2. Step 2: Convert to fraction form
    5,115.49/7,672.92 = 1,828.42/x
  3. Step 3: Cross multiply
    5,115.49x = 7,672.92 × 1,828.42
  4. Step 4: Simplify right side
    5,115.49x = 14,029,320.39
  5. Step 5: Solve for x
    x = 14,029,320.39/5,115.49
  6. Step 6: Final answer
    x = 2,742.52

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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.