Home / 20,771.34-28,688.34-15,131.31

Finding the Fourth Proportional to 20,771.34, 28,688.34 and 15,131.31

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Solution

The fourth proportional to 20,771.34, 28,688.34 and 15,131.31 is: 20,898.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,771.34 : 28,688.34 = 15,131.31 : x
  2. Step 2: Convert to fraction form
    20,771.34/28,688.34 = 15,131.31/x
  3. Step 3: Cross multiply
    20,771.34x = 28,688.34 × 15,131.31
  4. Step 4: Simplify right side
    20,771.34x = 434,092,115.09
  5. Step 5: Solve for x
    x = 434,092,115.09/20,771.34
  6. Step 6: Final answer
    x = 20,898.61

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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.