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Finding the Fourth Proportional to 13,953.58, 20,930.97 and 6,936.95

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Solution

The fourth proportional to 13,953.58, 20,930.97 and 6,936.95 is: 10,405.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,953.58 : 20,930.97 = 6,936.95 : x
  2. Step 2: Convert to fraction form
    13,953.58/20,930.97 = 6,936.95/x
  3. Step 3: Cross multiply
    13,953.58x = 20,930.97 × 6,936.95
  4. Step 4: Simplify right side
    13,953.58x = 145,197,092.34
  5. Step 5: Solve for x
    x = 145,197,092.34/13,953.58
  6. Step 6: Final answer
    x = 10,405.72

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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.