Home / 20,838.30-28,749.73-11,879.34

Finding the Fourth Proportional to 20,838.30, 28,749.73 and 11,879.34

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Solution

The fourth proportional to 20,838.30, 28,749.73 and 11,879.34 is: 16,389.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,838.30 : 28,749.73 = 11,879.34 : x
  2. Step 2: Convert to fraction form
    20,838.30/28,749.73 = 11,879.34/x
  3. Step 3: Cross multiply
    20,838.30x = 28,749.73 × 11,879.34
  4. Step 4: Simplify right side
    20,838.30x = 341,527,817.58
  5. Step 5: Solve for x
    x = 341,527,817.58/20,838.30
  6. Step 6: Final answer
    x = 16,389.43

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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.