Home / 20,453.76-28,239.84-12,072.96

Finding the Fourth Proportional to 20,453.76, 28,239.84 and 12,072.96

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Solution

The fourth proportional to 20,453.76, 28,239.84 and 12,072.96 is: 16,668.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,453.76 : 28,239.84 = 12,072.96 : x
  2. Step 2: Convert to fraction form
    20,453.76/28,239.84 = 12,072.96/x
  3. Step 3: Cross multiply
    20,453.76x = 28,239.84 × 12,072.96
  4. Step 4: Simplify right side
    20,453.76x = 340,938,458.73
  5. Step 5: Solve for x
    x = 340,938,458.73/20,453.76
  6. Step 6: Final answer
    x = 16,668.74

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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.