Home / 12,743.80-19,115.70-8,855.80

Finding the Fourth Proportional to 12,743.80, 19,115.70 and 8,855.80

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Solution

The fourth proportional to 12,743.80, 19,115.70 and 8,855.80 is: 13,283.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,743.80 : 19,115.70 = 8,855.80 : x
  2. Step 2: Convert to fraction form
    12,743.80/19,115.70 = 8,855.80/x
  3. Step 3: Cross multiply
    12,743.80x = 19,115.70 × 8,855.80
  4. Step 4: Simplify right side
    12,743.80x = 169,284,816.06
  5. Step 5: Solve for x
    x = 169,284,816.06/12,743.80
  6. Step 6: Final answer
    x = 13,283.70

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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.