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Finding the Fourth Proportional to 13,865.62, 20,800.86 and 6,072.64

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Solution

The fourth proportional to 13,865.62, 20,800.86 and 6,072.64 is: 9,110.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,865.62 : 20,800.86 = 6,072.64 : x
  2. Step 2: Convert to fraction form
    13,865.62/20,800.86 = 6,072.64/x
  3. Step 3: Cross multiply
    13,865.62x = 20,800.86 × 6,072.64
  4. Step 4: Simplify right side
    13,865.62x = 126,316,134.47
  5. Step 5: Solve for x
    x = 126,316,134.47/13,865.62
  6. Step 6: Final answer
    x = 9,110.02

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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.