Home / 20,911.08-28,855.38-11,958.28

Finding the Fourth Proportional to 20,911.08, 28,855.38 and 11,958.28

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Solution

The fourth proportional to 20,911.08, 28,855.38 and 11,958.28 is: 16,501.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,911.08 : 28,855.38 = 11,958.28 : x
  2. Step 2: Convert to fraction form
    20,911.08/28,855.38 = 11,958.28/x
  3. Step 3: Cross multiply
    20,911.08x = 28,855.38 × 11,958.28
  4. Step 4: Simplify right side
    20,911.08x = 345,060,713.55
  5. Step 5: Solve for x
    x = 345,060,713.55/20,911.08
  6. Step 6: Final answer
    x = 16,501.33

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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.