Home / 20,634.91-28,476.30-12,137.39

Finding the Fourth Proportional to 20,634.91, 28,476.30 and 12,137.39

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Solution

The fourth proportional to 20,634.91, 28,476.30 and 12,137.39 is: 16,749.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,634.91 : 28,476.30 = 12,137.39 : x
  2. Step 2: Convert to fraction form
    20,634.91/28,476.30 = 12,137.39/x
  3. Step 3: Cross multiply
    20,634.91x = 28,476.30 × 12,137.39
  4. Step 4: Simplify right side
    20,634.91x = 345,627,958.86
  5. Step 5: Solve for x
    x = 345,627,958.86/20,634.91
  6. Step 6: Final answer
    x = 16,749.67

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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.