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Finding the Fourth Proportional to 11,900.43, 16,407.63 and 7,643.97

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Solution

The fourth proportional to 11,900.43, 16,407.63 and 7,643.97 is: 10,539.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,900.43 : 16,407.63 = 7,643.97 : x
  2. Step 2: Convert to fraction form
    11,900.43/16,407.63 = 7,643.97/x
  3. Step 3: Cross multiply
    11,900.43x = 16,407.63 × 7,643.97
  4. Step 4: Simplify right side
    11,900.43x = 125,419,431.49
  5. Step 5: Solve for x
    x = 125,419,431.49/11,900.43
  6. Step 6: Final answer
    x = 10,539.07

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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.