Home / 13,865.40-19,089.92-11,221.56

Finding the Fourth Proportional to 13,865.40, 19,089.92 and 11,221.56

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Solution

The fourth proportional to 13,865.40, 19,089.92 and 11,221.56 is: 15,449.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,865.40 : 19,089.92 = 11,221.56 : x
  2. Step 2: Convert to fraction form
    13,865.40/19,089.92 = 11,221.56/x
  3. Step 3: Cross multiply
    13,865.40x = 19,089.92 × 11,221.56
  4. Step 4: Simplify right side
    13,865.40x = 214,218,682.68
  5. Step 5: Solve for x
    x = 214,218,682.68/13,865.40
  6. Step 6: Final answer
    x = 15,449.87

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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.