Home / 20,627.58-28,472.82-12,129.30

Finding the Fourth Proportional to 20,627.58, 28,472.82 and 12,129.30

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Solution

The fourth proportional to 20,627.58, 28,472.82 and 12,129.30 is: 16,742.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,627.58 : 28,472.82 = 12,129.30 : x
  2. Step 2: Convert to fraction form
    20,627.58/28,472.82 = 12,129.30/x
  3. Step 3: Cross multiply
    20,627.58x = 28,472.82 × 12,129.30
  4. Step 4: Simplify right side
    20,627.58x = 345,355,375.63
  5. Step 5: Solve for x
    x = 345,355,375.63/20,627.58
  6. Step 6: Final answer
    x = 16,742.41

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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.