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Finding the Fourth Proportional to 13,953.72, 20,930.75 and 4,093.20

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Solution

The fourth proportional to 13,953.72, 20,930.75 and 4,093.20 is: 6,139.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,953.72 : 20,930.75 = 4,093.20 : x
  2. Step 2: Convert to fraction form
    13,953.72/20,930.75 = 4,093.20/x
  3. Step 3: Cross multiply
    13,953.72x = 20,930.75 × 4,093.20
  4. Step 4: Simplify right side
    13,953.72x = 85,673,740.78
  5. Step 5: Solve for x
    x = 85,673,740.78/13,953.72
  6. Step 6: Final answer
    x = 6,139.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.