Home / 20,940.59-28,899.50-11,865.89

Finding the Fourth Proportional to 20,940.59, 28,899.50 and 11,865.89

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Solution

The fourth proportional to 20,940.59, 28,899.50 and 11,865.89 is: 16,375.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,940.59 : 28,899.50 = 11,865.89 : x
  2. Step 2: Convert to fraction form
    20,940.59/28,899.50 = 11,865.89/x
  3. Step 3: Cross multiply
    20,940.59x = 28,899.50 × 11,865.89
  4. Step 4: Simplify right side
    20,940.59x = 342,918,300.97
  5. Step 5: Solve for x
    x = 342,918,300.97/20,940.59
  6. Step 6: Final answer
    x = 16,375.77

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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.