Home / 19,811.88-29,719.44-6,660.72

Finding the Fourth Proportional to 19,811.88, 29,719.44 and 6,660.72

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Solution

The fourth proportional to 19,811.88, 29,719.44 and 6,660.72 is: 9,991.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,811.88 : 29,719.44 = 6,660.72 : x
  2. Step 2: Convert to fraction form
    19,811.88/29,719.44 = 6,660.72/x
  3. Step 3: Cross multiply
    19,811.88x = 29,719.44 × 6,660.72
  4. Step 4: Simplify right side
    19,811.88x = 197,952,868.40
  5. Step 5: Solve for x
    x = 197,952,868.40/19,811.88
  6. Step 6: Final answer
    x = 9,991.62

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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.