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Finding the Fourth Proportional to 20,162.85, 28,257.15 and 20,162.85

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Solution

The fourth proportional to 20,162.85, 28,257.15 and 20,162.85 is: 28,257.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,162.85 : 28,257.15 = 20,162.85 : x
  2. Step 2: Convert to fraction form
    20,162.85/28,257.15 = 20,162.85/x
  3. Step 3: Cross multiply
    20,162.85x = 28,257.15 × 20,162.85
  4. Step 4: Simplify right side
    20,162.85x = 569,744,676.88
  5. Step 5: Solve for x
    x = 569,744,676.88/20,162.85
  6. Step 6: Final answer
    x = 28,257.15

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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.