Home / 21,379.14-29,503.20-11,947.68

Finding the Fourth Proportional to 21,379.14, 29,503.20 and 11,947.68

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Solution

The fourth proportional to 21,379.14, 29,503.20 and 11,947.68 is: 16,487.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,379.14 : 29,503.20 = 11,947.68 : x
  2. Step 2: Convert to fraction form
    21,379.14/29,503.20 = 11,947.68/x
  3. Step 3: Cross multiply
    21,379.14x = 29,503.20 × 11,947.68
  4. Step 4: Simplify right side
    21,379.14x = 352,494,792.58
  5. Step 5: Solve for x
    x = 352,494,792.58/21,379.14
  6. Step 6: Final answer
    x = 16,487.79

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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.