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Finding the Fourth Proportional to 13,668.62, 20,503.13 and 4,308.46

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Solution

The fourth proportional to 13,668.62, 20,503.13 and 4,308.46 is: 6,462.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,668.62 : 20,503.13 = 4,308.46 : x
  2. Step 2: Convert to fraction form
    13,668.62/20,503.13 = 4,308.46/x
  3. Step 3: Cross multiply
    13,668.62x = 20,503.13 × 4,308.46
  4. Step 4: Simplify right side
    13,668.62x = 88,336,915.48
  5. Step 5: Solve for x
    x = 88,336,915.48/13,668.62
  6. Step 6: Final answer
    x = 6,462.75

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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.