Home / 20,634.86-28,475.70-12,137.90

Finding the Fourth Proportional to 20,634.86, 28,475.70 and 12,137.90

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Solution

The fourth proportional to 20,634.86, 28,475.70 and 12,137.90 is: 16,750.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,634.86 : 28,475.70 = 12,137.90 : x
  2. Step 2: Convert to fraction form
    20,634.86/28,475.70 = 12,137.90/x
  3. Step 3: Cross multiply
    20,634.86x = 28,475.70 × 12,137.90
  4. Step 4: Simplify right side
    20,634.86x = 345,635,199.03
  5. Step 5: Solve for x
    x = 345,635,199.03/20,634.86
  6. Step 6: Final answer
    x = 16,750.06

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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.