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Finding the Fourth Proportional to 11,992.95, 17,987.28 and 7,056.81

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Solution

The fourth proportional to 11,992.95, 17,987.28 and 7,056.81 is: 10,583.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,992.95 : 17,987.28 = 7,056.81 : x
  2. Step 2: Convert to fraction form
    11,992.95/17,987.28 = 7,056.81/x
  3. Step 3: Cross multiply
    11,992.95x = 17,987.28 × 7,056.81
  4. Step 4: Simplify right side
    11,992.95x = 126,932,817.38
  5. Step 5: Solve for x
    x = 126,932,817.38/11,992.95
  6. Step 6: Final answer
    x = 10,583.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.