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Finding the Fourth Proportional to 13,953.20, 20,930.41 and 6,936.58

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Solution

The fourth proportional to 13,953.20, 20,930.41 and 6,936.58 is: 10,405.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,953.20 : 20,930.41 = 6,936.58 : x
  2. Step 2: Convert to fraction form
    13,953.20/20,930.41 = 6,936.58/x
  3. Step 3: Cross multiply
    13,953.20x = 20,930.41 × 6,936.58
  4. Step 4: Simplify right side
    13,953.20x = 145,185,358.75
  5. Step 5: Solve for x
    x = 145,185,358.75/13,953.20
  6. Step 6: Final answer
    x = 10,405.17

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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.