Home / 20,885.90-28,819.87-11,933.98

Finding the Fourth Proportional to 20,885.90, 28,819.87 and 11,933.98

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Solution

The fourth proportional to 20,885.90, 28,819.87 and 11,933.98 is: 16,467.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,885.90 : 28,819.87 = 11,933.98 : x
  2. Step 2: Convert to fraction form
    20,885.90/28,819.87 = 11,933.98/x
  3. Step 3: Cross multiply
    20,885.90x = 28,819.87 × 11,933.98
  4. Step 4: Simplify right side
    20,885.90x = 343,935,650.30
  5. Step 5: Solve for x
    x = 343,935,650.30/20,885.90
  6. Step 6: Final answer
    x = 16,467.36

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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.