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Finding the Fourth Proportional to 20,668.50, 28,597.59 and 18,021.42

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Solution

The fourth proportional to 20,668.50, 28,597.59 and 18,021.42 is: 24,935.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,668.50 : 28,597.59 = 18,021.42 : x
  2. Step 2: Convert to fraction form
    20,668.50/28,597.59 = 18,021.42/x
  3. Step 3: Cross multiply
    20,668.50x = 28,597.59 × 18,021.42
  4. Step 4: Simplify right side
    20,668.50x = 515,369,180.38
  5. Step 5: Solve for x
    x = 515,369,180.38/20,668.50
  6. Step 6: Final answer
    x = 24,935.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.