Home / 12,786.24-19,178.72-4,020.96

Finding the Fourth Proportional to 12,786.24, 19,178.72 and 4,020.96

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Solution

The fourth proportional to 12,786.24, 19,178.72 and 4,020.96 is: 6,031.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,786.24 : 19,178.72 = 4,020.96 : x
  2. Step 2: Convert to fraction form
    12,786.24/19,178.72 = 4,020.96/x
  3. Step 3: Cross multiply
    12,786.24x = 19,178.72 × 4,020.96
  4. Step 4: Simplify right side
    12,786.24x = 77,116,865.97
  5. Step 5: Solve for x
    x = 77,116,865.97/12,786.24
  6. Step 6: Final answer
    x = 6,031.24

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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.