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Finding the Fourth Proportional to 18,668.40, 27,921.60 and 16,708.20

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Solution

The fourth proportional to 18,668.40, 27,921.60 and 16,708.20 is: 24,989.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,668.40 : 27,921.60 = 16,708.20 : x
  2. Step 2: Convert to fraction form
    18,668.40/27,921.60 = 16,708.20/x
  3. Step 3: Cross multiply
    18,668.40x = 27,921.60 × 16,708.20
  4. Step 4: Simplify right side
    18,668.40x = 466,519,677.12
  5. Step 5: Solve for x
    x = 466,519,677.12/18,668.40
  6. Step 6: Final answer
    x = 24,989.81

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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.