Home / 21,245.41-29,318.72-11,815.80

Finding the Fourth Proportional to 21,245.41, 29,318.72 and 11,815.80

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Solution

The fourth proportional to 21,245.41, 29,318.72 and 11,815.80 is: 16,305.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,245.41 : 29,318.72 = 11,815.80 : x
  2. Step 2: Convert to fraction form
    21,245.41/29,318.72 = 11,815.80/x
  3. Step 3: Cross multiply
    21,245.41x = 29,318.72 × 11,815.80
  4. Step 4: Simplify right side
    21,245.41x = 346,424,131.78
  5. Step 5: Solve for x
    x = 346,424,131.78/21,245.41
  6. Step 6: Final answer
    x = 16,305.83

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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.