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Finding the Fourth Proportional to 20,661, 30,965.58 and 10,668.84

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Solution

The fourth proportional to 20,661, 30,965.58 and 10,668.84 is: 15,989.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,661 : 30,965.58 = 10,668.84 : x
  2. Step 2: Convert to fraction form
    20,661/30,965.58 = 10,668.84/x
  3. Step 3: Cross multiply
    20,661x = 30,965.58 × 10,668.84
  4. Step 4: Simplify right side
    20,661x = 330,366,818.53
  5. Step 5: Solve for x
    x = 330,366,818.53/20,661
  6. Step 6: Final answer
    x = 15,989.88

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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.