Home / 12,174.78-18,262.69-4,780.84

Finding the Fourth Proportional to 12,174.78, 18,262.69 and 4,780.84

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Solution

The fourth proportional to 12,174.78, 18,262.69 and 4,780.84 is: 7,171.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,174.78 : 18,262.69 = 4,780.84 : x
  2. Step 2: Convert to fraction form
    12,174.78/18,262.69 = 4,780.84/x
  3. Step 3: Cross multiply
    12,174.78x = 18,262.69 × 4,780.84
  4. Step 4: Simplify right side
    12,174.78x = 87,311,021.69
  5. Step 5: Solve for x
    x = 87,311,021.69/12,174.78
  6. Step 6: Final answer
    x = 7,171.47

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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.