Home / 20,379.70-28,126.32-13,573.34

Finding the Fourth Proportional to 20,379.70, 28,126.32 and 13,573.34

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Solution

The fourth proportional to 20,379.70, 28,126.32 and 13,573.34 is: 18,732.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,379.70 : 28,126.32 = 13,573.34 : x
  2. Step 2: Convert to fraction form
    20,379.70/28,126.32 = 13,573.34/x
  3. Step 3: Cross multiply
    20,379.70x = 28,126.32 × 13,573.34
  4. Step 4: Simplify right side
    20,379.70x = 381,768,238.25
  5. Step 5: Solve for x
    x = 381,768,238.25/20,379.70
  6. Step 6: Final answer
    x = 18,732.77

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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.