Home / 12,940.01-19,396.54-8,780.39

Finding the Fourth Proportional to 12,940.01, 19,396.54 and 8,780.39

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Solution

The fourth proportional to 12,940.01, 19,396.54 and 8,780.39 is: 13,161.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,940.01 : 19,396.54 = 8,780.39 : x
  2. Step 2: Convert to fraction form
    12,940.01/19,396.54 = 8,780.39/x
  3. Step 3: Cross multiply
    12,940.01x = 19,396.54 × 8,780.39
  4. Step 4: Simplify right side
    12,940.01x = 170,309,185.85
  5. Step 5: Solve for x
    x = 170,309,185.85/12,940.01
  6. Step 6: Final answer
    x = 13,161.44

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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.