Home / 11,123.10-16,721.10-7,858.80

Finding the Fourth Proportional to 11,123.10, 16,721.10 and 7,858.80

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Solution

The fourth proportional to 11,123.10, 16,721.10 and 7,858.80 is: 11,813.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,123.10 : 16,721.10 = 7,858.80 : x
  2. Step 2: Convert to fraction form
    11,123.10/16,721.10 = 7,858.80/x
  3. Step 3: Cross multiply
    11,123.10x = 16,721.10 × 7,858.80
  4. Step 4: Simplify right side
    11,123.10x = 131,407,780.68
  5. Step 5: Solve for x
    x = 131,407,780.68/11,123.10
  6. Step 6: Final answer
    x = 11,813.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.