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Finding the Fourth Proportional to 20,447.88, 30,661.80 and 12,125.67

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Solution

The fourth proportional to 20,447.88, 30,661.80 and 12,125.67 is: 18,182.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,447.88 : 30,661.80 = 12,125.67 : x
  2. Step 2: Convert to fraction form
    20,447.88/30,661.80 = 12,125.67/x
  3. Step 3: Cross multiply
    20,447.88x = 30,661.80 × 12,125.67
  4. Step 4: Simplify right side
    20,447.88x = 371,794,822.93
  5. Step 5: Solve for x
    x = 371,794,822.93/20,447.88
  6. Step 6: Final answer
    x = 18,182.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.