Home / 12,756.48-19,134.72-3,991.92

Finding the Fourth Proportional to 12,756.48, 19,134.72 and 3,991.92

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Solution

The fourth proportional to 12,756.48, 19,134.72 and 3,991.92 is: 5,987.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,756.48 : 19,134.72 = 3,991.92 : x
  2. Step 2: Convert to fraction form
    12,756.48/19,134.72 = 3,991.92/x
  3. Step 3: Cross multiply
    12,756.48x = 19,134.72 × 3,991.92
  4. Step 4: Simplify right side
    12,756.48x = 76,384,271.46
  5. Step 5: Solve for x
    x = 76,384,271.46/12,756.48
  6. Step 6: Final answer
    x = 5,987.88

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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.