Home / 20,769.90-28,662.26-12,808.94

Finding the Fourth Proportional to 20,769.90, 28,662.26 and 12,808.94

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Solution

The fourth proportional to 20,769.90, 28,662.26 and 12,808.94 is: 17,676.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,769.90 : 28,662.26 = 12,808.94 : x
  2. Step 2: Convert to fraction form
    20,769.90/28,662.26 = 12,808.94/x
  3. Step 3: Cross multiply
    20,769.90x = 28,662.26 × 12,808.94
  4. Step 4: Simplify right side
    20,769.90x = 367,133,168.60
  5. Step 5: Solve for x
    x = 367,133,168.60/20,769.90
  6. Step 6: Final answer
    x = 17,676.21

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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.