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Finding the Fourth Proportional to 20,676.90, 28,999.50 and 20,676.90

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Solution

The fourth proportional to 20,676.90, 28,999.50 and 20,676.90 is: 28,999.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,676.90 : 28,999.50 = 20,676.90 : x
  2. Step 2: Convert to fraction form
    20,676.90/28,999.50 = 20,676.90/x
  3. Step 3: Cross multiply
    20,676.90x = 28,999.50 × 20,676.90
  4. Step 4: Simplify right side
    20,676.90x = 599,619,761.55
  5. Step 5: Solve for x
    x = 599,619,761.55/20,676.90
  6. Step 6: Final answer
    x = 28,999.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.