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Finding the Fourth Proportional to 12,400.63, 17,112.87 and 6,811.63

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Solution

The fourth proportional to 12,400.63, 17,112.87 and 6,811.63 is: 9,400.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,400.63 : 17,112.87 = 6,811.63 : x
  2. Step 2: Convert to fraction form
    12,400.63/17,112.87 = 6,811.63/x
  3. Step 3: Cross multiply
    12,400.63x = 17,112.87 × 6,811.63
  4. Step 4: Simplify right side
    12,400.63x = 116,566,538.68
  5. Step 5: Solve for x
    x = 116,566,538.68/12,400.63
  6. Step 6: Final answer
    x = 9,400.05

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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.