Home / 20,971.05-28,939.59-12,023.82

Finding the Fourth Proportional to 20,971.05, 28,939.59 and 12,023.82

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Solution

The fourth proportional to 20,971.05, 28,939.59 and 12,023.82 is: 16,592.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,971.05 : 28,939.59 = 12,023.82 : x
  2. Step 2: Convert to fraction form
    20,971.05/28,939.59 = 12,023.82/x
  3. Step 3: Cross multiply
    20,971.05x = 28,939.59 × 12,023.82
  4. Step 4: Simplify right side
    20,971.05x = 347,964,421.03
  5. Step 5: Solve for x
    x = 347,964,421.03/20,971.05
  6. Step 6: Final answer
    x = 16,592.61

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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.