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Finding the Fourth Proportional to 12,616.63, 17,284.86 and 12,143.68

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Solution

The fourth proportional to 12,616.63, 17,284.86 and 12,143.68 is: 16,636.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,616.63 : 17,284.86 = 12,143.68 : x
  2. Step 2: Convert to fraction form
    12,616.63/17,284.86 = 12,143.68/x
  3. Step 3: Cross multiply
    12,616.63x = 17,284.86 × 12,143.68
  4. Step 4: Simplify right side
    12,616.63x = 209,901,765.47
  5. Step 5: Solve for x
    x = 209,901,765.47/12,616.63
  6. Step 6: Final answer
    x = 16,636.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.