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Finding the Fourth Proportional to 13,668.71, 18,865.89 and 8,950.25

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Solution

The fourth proportional to 13,668.71, 18,865.89 and 8,950.25 is: 12,353.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,668.71 : 18,865.89 = 8,950.25 : x
  2. Step 2: Convert to fraction form
    13,668.71/18,865.89 = 8,950.25/x
  3. Step 3: Cross multiply
    13,668.71x = 18,865.89 × 8,950.25
  4. Step 4: Simplify right side
    13,668.71x = 168,854,431.97
  5. Step 5: Solve for x
    x = 168,854,431.97/13,668.71
  6. Step 6: Final answer
    x = 12,353.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.