Home / 42,940.82-64,404.30-11,768.78

Finding the Fourth Proportional to 42,940.82, 64,404.30 and 11,768.78

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Solution

The fourth proportional to 42,940.82, 64,404.30 and 11,768.78 is: 17,651.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,940.82 : 64,404.30 = 11,768.78 : x
  2. Step 2: Convert to fraction form
    42,940.82/64,404.30 = 11,768.78/x
  3. Step 3: Cross multiply
    42,940.82x = 64,404.30 × 11,768.78
  4. Step 4: Simplify right side
    42,940.82x = 757,960,037.75
  5. Step 5: Solve for x
    x = 757,960,037.75/42,940.82
  6. Step 6: Final answer
    x = 17,651.27

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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.