Home / 12,939.58-19,408.68-4,174.49

Finding the Fourth Proportional to 12,939.58, 19,408.68 and 4,174.49

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Solution

The fourth proportional to 12,939.58, 19,408.68 and 4,174.49 is: 6,261.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,939.58 : 19,408.68 = 4,174.49 : x
  2. Step 2: Convert to fraction form
    12,939.58/19,408.68 = 4,174.49/x
  3. Step 3: Cross multiply
    12,939.58x = 19,408.68 × 4,174.49
  4. Step 4: Simplify right side
    12,939.58x = 81,021,389.09
  5. Step 5: Solve for x
    x = 81,021,389.09/12,939.58
  6. Step 6: Final answer
    x = 6,261.52

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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.