Home / 20,911.40-28,859.24-11,958.68

Finding the Fourth Proportional to 20,911.40, 28,859.24 and 11,958.68

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Solution

The fourth proportional to 20,911.40, 28,859.24 and 11,958.68 is: 16,503.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,911.40 : 28,859.24 = 11,958.68 : x
  2. Step 2: Convert to fraction form
    20,911.40/28,859.24 = 11,958.68/x
  3. Step 3: Cross multiply
    20,911.40x = 28,859.24 × 11,958.68
  4. Step 4: Simplify right side
    20,911.40x = 345,118,416.20
  5. Step 5: Solve for x
    x = 345,118,416.20/20,911.40
  6. Step 6: Final answer
    x = 16,503.84

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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.