Home / 21,968.78-32,975.03-12,112.70

Finding the Fourth Proportional to 21,968.78, 32,975.03 and 12,112.70

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Solution

The fourth proportional to 21,968.78, 32,975.03 and 12,112.70 is: 18,181.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,968.78 : 32,975.03 = 12,112.70 : x
  2. Step 2: Convert to fraction form
    21,968.78/32,975.03 = 12,112.70/x
  3. Step 3: Cross multiply
    21,968.78x = 32,975.03 × 12,112.70
  4. Step 4: Simplify right side
    21,968.78x = 399,416,511.29
  5. Step 5: Solve for x
    x = 399,416,511.29/21,968.78
  6. Step 6: Final answer
    x = 18,181.10

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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.