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Finding the Fourth Proportional to 20,425.86, 28,163.16 and 14,751.54

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Solution

The fourth proportional to 20,425.86, 28,163.16 and 14,751.54 is: 20,339.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,425.86 : 28,163.16 = 14,751.54 : x
  2. Step 2: Convert to fraction form
    20,425.86/28,163.16 = 14,751.54/x
  3. Step 3: Cross multiply
    20,425.86x = 28,163.16 × 14,751.54
  4. Step 4: Simplify right side
    20,425.86x = 415,449,981.27
  5. Step 5: Solve for x
    x = 415,449,981.27/20,425.86
  6. Step 6: Final answer
    x = 20,339.41

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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.