Home / 21,379.92-29,503.80-11,949.36

Finding the Fourth Proportional to 21,379.92, 29,503.80 and 11,949.36

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Solution

The fourth proportional to 21,379.92, 29,503.80 and 11,949.36 is: 16,489.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,379.92 : 29,503.80 = 11,949.36 : x
  2. Step 2: Convert to fraction form
    21,379.92/29,503.80 = 11,949.36/x
  3. Step 3: Cross multiply
    21,379.92x = 29,503.80 × 11,949.36
  4. Step 4: Simplify right side
    21,379.92x = 352,551,527.57
  5. Step 5: Solve for x
    x = 352,551,527.57/21,379.92
  6. Step 6: Final answer
    x = 16,489.84

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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.