Home / 20,458.89-28,234.43-13,641.15

Finding the Fourth Proportional to 20,458.89, 28,234.43 and 13,641.15

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Solution

The fourth proportional to 20,458.89, 28,234.43 and 13,641.15 is: 18,825.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,458.89 : 28,234.43 = 13,641.15 : x
  2. Step 2: Convert to fraction form
    20,458.89/28,234.43 = 13,641.15/x
  3. Step 3: Cross multiply
    20,458.89x = 28,234.43 × 13,641.15
  4. Step 4: Simplify right side
    20,458.89x = 385,150,128.90
  5. Step 5: Solve for x
    x = 385,150,128.90/20,458.89
  6. Step 6: Final answer
    x = 18,825.56

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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.