Home / 11,325.31-16,981.80-3,929.20

Finding the Fourth Proportional to 11,325.31, 16,981.80 and 3,929.20

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Solution

The fourth proportional to 11,325.31, 16,981.80 and 3,929.20 is: 5,891.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,325.31 : 16,981.80 = 3,929.20 : x
  2. Step 2: Convert to fraction form
    11,325.31/16,981.80 = 3,929.20/x
  3. Step 3: Cross multiply
    11,325.31x = 16,981.80 × 3,929.20
  4. Step 4: Simplify right side
    11,325.31x = 66,724,888.56
  5. Step 5: Solve for x
    x = 66,724,888.56/11,325.31
  6. Step 6: Final answer
    x = 5,891.66

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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.