Home / 12,786.78-19,065.44-12,553.50

Finding the Fourth Proportional to 12,786.78, 19,065.44 and 12,553.50

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Solution

The fourth proportional to 12,786.78, 19,065.44 and 12,553.50 is: 18,717.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,786.78 : 19,065.44 = 12,553.50 : x
  2. Step 2: Convert to fraction form
    12,786.78/19,065.44 = 12,553.50/x
  3. Step 3: Cross multiply
    12,786.78x = 19,065.44 × 12,553.50
  4. Step 4: Simplify right side
    12,786.78x = 239,337,938.27
  5. Step 5: Solve for x
    x = 239,337,938.27/12,786.78
  6. Step 6: Final answer
    x = 18,717.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.