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Finding the Fourth Proportional to 12,668.96, 17,458.80 and 8,936.48

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Solution

The fourth proportional to 12,668.96, 17,458.80 and 8,936.48 is: 12,315.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,668.96 : 17,458.80 = 8,936.48 : x
  2. Step 2: Convert to fraction form
    12,668.96/17,458.80 = 8,936.48/x
  3. Step 3: Cross multiply
    12,668.96x = 17,458.80 × 8,936.48
  4. Step 4: Simplify right side
    12,668.96x = 156,020,217.02
  5. Step 5: Solve for x
    x = 156,020,217.02/12,668.96
  6. Step 6: Final answer
    x = 12,315.16

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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.