Home / 20,438.34-28,194.32-13,725.87

Finding the Fourth Proportional to 20,438.34, 28,194.32 and 13,725.87

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Solution

The fourth proportional to 20,438.34, 28,194.32 and 13,725.87 is: 18,934.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,438.34 : 28,194.32 = 13,725.87 : x
  2. Step 2: Convert to fraction form
    20,438.34/28,194.32 = 13,725.87/x
  3. Step 3: Cross multiply
    20,438.34x = 28,194.32 × 13,725.87
  4. Step 4: Simplify right side
    20,438.34x = 386,991,502.43
  5. Step 5: Solve for x
    x = 386,991,502.43/20,438.34
  6. Step 6: Final answer
    x = 18,934.59

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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.