Home / 20,633.79-28,481.40-12,135.54

Finding the Fourth Proportional to 20,633.79, 28,481.40 and 12,135.54

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Solution

The fourth proportional to 20,633.79, 28,481.40 and 12,135.54 is: 16,751.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,633.79 : 28,481.40 = 12,135.54 : x
  2. Step 2: Convert to fraction form
    20,633.79/28,481.40 = 12,135.54/x
  3. Step 3: Cross multiply
    20,633.79x = 28,481.40 × 12,135.54
  4. Step 4: Simplify right side
    20,633.79x = 345,637,168.96
  5. Step 5: Solve for x
    x = 345,637,168.96/20,633.79
  6. Step 6: Final answer
    x = 16,751.03

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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.