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Finding the Fourth Proportional to 13,668.48, 20,455.74 and 8,668.08

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Solution

The fourth proportional to 13,668.48, 20,455.74 and 8,668.08 is: 12,972.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,668.48 : 20,455.74 = 8,668.08 : x
  2. Step 2: Convert to fraction form
    13,668.48/20,455.74 = 8,668.08/x
  3. Step 3: Cross multiply
    13,668.48x = 20,455.74 × 8,668.08
  4. Step 4: Simplify right side
    13,668.48x = 177,311,990.78
  5. Step 5: Solve for x
    x = 177,311,990.78/13,668.48
  6. Step 6: Final answer
    x = 12,972.33

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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.