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Finding the Fourth Proportional to 20,571.71, 30,834.23 and 9,455.42

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Solution

The fourth proportional to 20,571.71, 30,834.23 and 9,455.42 is: 14,172.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,571.71 : 30,834.23 = 9,455.42 : x
  2. Step 2: Convert to fraction form
    20,571.71/30,834.23 = 9,455.42/x
  3. Step 3: Cross multiply
    20,571.71x = 30,834.23 × 9,455.42
  4. Step 4: Simplify right side
    20,571.71x = 291,550,624.84
  5. Step 5: Solve for x
    x = 291,550,624.84/20,571.71
  6. Step 6: Final answer
    x = 14,172.41

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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.