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Finding the Fourth Proportional to 11,955.96, 18,003.42 and 8,857.98

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Solution

The fourth proportional to 11,955.96, 18,003.42 and 8,857.98 is: 13,338.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,955.96 : 18,003.42 = 8,857.98 : x
  2. Step 2: Convert to fraction form
    11,955.96/18,003.42 = 8,857.98/x
  3. Step 3: Cross multiply
    11,955.96x = 18,003.42 × 8,857.98
  4. Step 4: Simplify right side
    11,955.96x = 159,473,934.29
  5. Step 5: Solve for x
    x = 159,473,934.29/11,955.96
  6. Step 6: Final answer
    x = 13,338.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.