Home / 12,581.12-18,871.36-3,815.68

Finding the Fourth Proportional to 12,581.12, 18,871.36 and 3,815.68

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Solution

The fourth proportional to 12,581.12, 18,871.36 and 3,815.68 is: 5,723.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,581.12 : 18,871.36 = 3,815.68 : x
  2. Step 2: Convert to fraction form
    12,581.12/18,871.36 = 3,815.68/x
  3. Step 3: Cross multiply
    12,581.12x = 18,871.36 × 3,815.68
  4. Step 4: Simplify right side
    12,581.12x = 72,007,070.92
  5. Step 5: Solve for x
    x = 72,007,070.92/12,581.12
  6. Step 6: Final answer
    x = 5,723.42

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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.