Home / 20,909.44-28,855.20-11,477.92

Finding the Fourth Proportional to 20,909.44, 28,855.20 and 11,477.92

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Solution

The fourth proportional to 20,909.44, 28,855.20 and 11,477.92 is: 15,839.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,909.44 : 28,855.20 = 11,477.92 : x
  2. Step 2: Convert to fraction form
    20,909.44/28,855.20 = 11,477.92/x
  3. Step 3: Cross multiply
    20,909.44x = 28,855.20 × 11,477.92
  4. Step 4: Simplify right side
    20,909.44x = 331,197,677.18
  5. Step 5: Solve for x
    x = 331,197,677.18/20,909.44
  6. Step 6: Final answer
    x = 15,839.62

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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.