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Finding the Fourth Proportional to 13,953.16, 20,923.72 and 5,181.64

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Solution

The fourth proportional to 13,953.16, 20,923.72 and 5,181.64 is: 7,770.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,953.16 : 20,923.72 = 5,181.64 : x
  2. Step 2: Convert to fraction form
    13,953.16/20,923.72 = 5,181.64/x
  3. Step 3: Cross multiply
    13,953.16x = 20,923.72 × 5,181.64
  4. Step 4: Simplify right side
    13,953.16x = 108,419,184.50
  5. Step 5: Solve for x
    x = 108,419,184.50/13,953.16
  6. Step 6: Final answer
    x = 7,770.22

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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.