Home / 20,638.87-28,481.39-11,207.50

Finding the Fourth Proportional to 20,638.87, 28,481.39 and 11,207.50

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Solution

The fourth proportional to 20,638.87, 28,481.39 and 11,207.50 is: 15,466.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,638.87 : 28,481.39 = 11,207.50 : x
  2. Step 2: Convert to fraction form
    20,638.87/28,481.39 = 11,207.50/x
  3. Step 3: Cross multiply
    20,638.87x = 28,481.39 × 11,207.50
  4. Step 4: Simplify right side
    20,638.87x = 319,205,178.43
  5. Step 5: Solve for x
    x = 319,205,178.43/20,638.87
  6. Step 6: Final answer
    x = 15,466.21

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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.