Home / 20,673.78-28,531.06-12,181.56

Finding the Fourth Proportional to 20,673.78, 28,531.06 and 12,181.56

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Solution

The fourth proportional to 20,673.78, 28,531.06 and 12,181.56 is: 16,811.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,673.78 : 28,531.06 = 12,181.56 : x
  2. Step 2: Convert to fraction form
    20,673.78/28,531.06 = 12,181.56/x
  3. Step 3: Cross multiply
    20,673.78x = 28,531.06 × 12,181.56
  4. Step 4: Simplify right side
    20,673.78x = 347,552,819.25
  5. Step 5: Solve for x
    x = 347,552,819.25/20,673.78
  6. Step 6: Final answer
    x = 16,811.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.