Home / 20,586.44-28,409.39-11,155

Finding the Fourth Proportional to 20,586.44, 28,409.39 and 11,155

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Solution

The fourth proportional to 20,586.44, 28,409.39 and 11,155 is: 15,393.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,586.44 : 28,409.39 = 11,155 : x
  2. Step 2: Convert to fraction form
    20,586.44/28,409.39 = 11,155/x
  3. Step 3: Cross multiply
    20,586.44x = 28,409.39 × 11,155
  4. Step 4: Simplify right side
    20,586.44x = 316,906,745.45
  5. Step 5: Solve for x
    x = 316,906,745.45/20,586.44
  6. Step 6: Final answer
    x = 15,393.96

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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.