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Finding the Fourth Proportional to 20,676.92, 28,462.12 and 18,019.72

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Solution

The fourth proportional to 20,676.92, 28,462.12 and 18,019.72 is: 24,804.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,676.92 : 28,462.12 = 18,019.72 : x
  2. Step 2: Convert to fraction form
    20,676.92/28,462.12 = 18,019.72/x
  3. Step 3: Cross multiply
    20,676.92x = 28,462.12 × 18,019.72
  4. Step 4: Simplify right side
    20,676.92x = 512,879,433.01
  5. Step 5: Solve for x
    x = 512,879,433.01/20,676.92
  6. Step 6: Final answer
    x = 24,804.44

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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.