Home / 11,934.78-17,905.20-8,431.63

Finding the Fourth Proportional to 11,934.78, 17,905.20 and 8,431.63

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Solution

The fourth proportional to 11,934.78, 17,905.20 and 8,431.63 is: 12,649.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,934.78 : 17,905.20 = 8,431.63 : x
  2. Step 2: Convert to fraction form
    11,934.78/17,905.20 = 8,431.63/x
  3. Step 3: Cross multiply
    11,934.78x = 17,905.20 × 8,431.63
  4. Step 4: Simplify right side
    11,934.78x = 150,969,889.79
  5. Step 5: Solve for x
    x = 150,969,889.79/11,934.78
  6. Step 6: Final answer
    x = 12,649.58

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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.