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Finding the Fourth Proportional to 13,668.72, 20,503.08 and 4,435.44

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Solution

The fourth proportional to 13,668.72, 20,503.08 and 4,435.44 is: 6,653.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,668.72 : 20,503.08 = 4,435.44 : x
  2. Step 2: Convert to fraction form
    13,668.72/20,503.08 = 4,435.44/x
  3. Step 3: Cross multiply
    13,668.72x = 20,503.08 × 4,435.44
  4. Step 4: Simplify right side
    13,668.72x = 90,940,181.16
  5. Step 5: Solve for x
    x = 90,940,181.16/13,668.72
  6. Step 6: Final answer
    x = 6,653.16

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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.