Home / 11,810.20-17,715.30-8,123.80

Finding the Fourth Proportional to 11,810.20, 17,715.30 and 8,123.80

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Solution

The fourth proportional to 11,810.20, 17,715.30 and 8,123.80 is: 12,185.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,810.20 : 17,715.30 = 8,123.80 : x
  2. Step 2: Convert to fraction form
    11,810.20/17,715.30 = 8,123.80/x
  3. Step 3: Cross multiply
    11,810.20x = 17,715.30 × 8,123.80
  4. Step 4: Simplify right side
    11,810.20x = 143,915,554.14
  5. Step 5: Solve for x
    x = 143,915,554.14/11,810.20
  6. Step 6: Final answer
    x = 12,185.70

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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.