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Finding the Fourth Proportional to 20,668.86, 30,953.88 and 11,294.87

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Solution

The fourth proportional to 20,668.86, 30,953.88 and 11,294.87 is: 16,915.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,668.86 : 30,953.88 = 11,294.87 : x
  2. Step 2: Convert to fraction form
    20,668.86/30,953.88 = 11,294.87/x
  3. Step 3: Cross multiply
    20,668.86x = 30,953.88 × 11,294.87
  4. Step 4: Simplify right side
    20,668.86x = 349,619,895.83
  5. Step 5: Solve for x
    x = 349,619,895.83/20,668.86
  6. Step 6: Final answer
    x = 16,915.30

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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.