Home / 20,516.96-28,311.36-12,561.44

Finding the Fourth Proportional to 20,516.96, 28,311.36 and 12,561.44

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Solution

The fourth proportional to 20,516.96, 28,311.36 and 12,561.44 is: 17,333.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,516.96 : 28,311.36 = 12,561.44 : x
  2. Step 2: Convert to fraction form
    20,516.96/28,311.36 = 12,561.44/x
  3. Step 3: Cross multiply
    20,516.96x = 28,311.36 × 12,561.44
  4. Step 4: Simplify right side
    20,516.96x = 355,631,449.96
  5. Step 5: Solve for x
    x = 355,631,449.96/20,516.96
  6. Step 6: Final answer
    x = 17,333.54

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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.