Home / 20,786.85-28,685.85-11,226.74

Finding the Fourth Proportional to 20,786.85, 28,685.85 and 11,226.74

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Solution

The fourth proportional to 20,786.85, 28,685.85 and 11,226.74 is: 15,492.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,786.85 : 28,685.85 = 11,226.74 : x
  2. Step 2: Convert to fraction form
    20,786.85/28,685.85 = 11,226.74/x
  3. Step 3: Cross multiply
    20,786.85x = 28,685.85 × 11,226.74
  4. Step 4: Simplify right side
    20,786.85x = 322,048,579.63
  5. Step 5: Solve for x
    x = 322,048,579.63/20,786.85
  6. Step 6: Final answer
    x = 15,492.90

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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.