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Finding the Fourth Proportional to 19,668.51, 29,469.92 and 8,558.55

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Solution

The fourth proportional to 19,668.51, 29,469.92 and 8,558.55 is: 12,823.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,668.51 : 29,469.92 = 8,558.55 : x
  2. Step 2: Convert to fraction form
    19,668.51/29,469.92 = 8,558.55/x
  3. Step 3: Cross multiply
    19,668.51x = 29,469.92 × 8,558.55
  4. Step 4: Simplify right side
    19,668.51x = 252,219,741.02
  5. Step 5: Solve for x
    x = 252,219,741.02/19,668.51
  6. Step 6: Final answer
    x = 12,823.53

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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.