Home / 19,921.91-27,489.96-11,421.72

Finding the Fourth Proportional to 19,921.91, 27,489.96 and 11,421.72

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Solution

The fourth proportional to 19,921.91, 27,489.96 and 11,421.72 is: 15,760.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,921.91 : 27,489.96 = 11,421.72 : x
  2. Step 2: Convert to fraction form
    19,921.91/27,489.96 = 11,421.72/x
  3. Step 3: Cross multiply
    19,921.91x = 27,489.96 × 11,421.72
  4. Step 4: Simplify right side
    19,921.91x = 313,982,625.93
  5. Step 5: Solve for x
    x = 313,982,625.93/19,921.91
  6. Step 6: Final answer
    x = 15,760.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.