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Finding the Fourth Proportional to 13,953.91, 20,930.86 and 6,161.17

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Solution

The fourth proportional to 13,953.91, 20,930.86 and 6,161.17 is: 9,241.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,953.91 : 20,930.86 = 6,161.17 : x
  2. Step 2: Convert to fraction form
    13,953.91/20,930.86 = 6,161.17/x
  3. Step 3: Cross multiply
    13,953.91x = 20,930.86 × 6,161.17
  4. Step 4: Simplify right side
    13,953.91x = 128,958,586.71
  5. Step 5: Solve for x
    x = 128,958,586.71/13,953.91
  6. Step 6: Final answer
    x = 9,241.75

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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.