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Finding the Fourth Proportional to 13,451.40, 20,177.28 and 4,091.40

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Solution

The fourth proportional to 13,451.40, 20,177.28 and 4,091.40 is: 6,137.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,451.40 : 20,177.28 = 4,091.40 : x
  2. Step 2: Convert to fraction form
    13,451.40/20,177.28 = 4,091.40/x
  3. Step 3: Cross multiply
    13,451.40x = 20,177.28 × 4,091.40
  4. Step 4: Simplify right side
    13,451.40x = 82,553,323.39
  5. Step 5: Solve for x
    x = 82,553,323.39/13,451.40
  6. Step 6: Final answer
    x = 6,137.15

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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.