Home / 12,721.90-19,084.18-3,837.28

Finding the Fourth Proportional to 12,721.90, 19,084.18 and 3,837.28

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Solution

The fourth proportional to 12,721.90, 19,084.18 and 3,837.28 is: 5,756.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,721.90 : 19,084.18 = 3,837.28 : x
  2. Step 2: Convert to fraction form
    12,721.90/19,084.18 = 3,837.28/x
  3. Step 3: Cross multiply
    12,721.90x = 19,084.18 × 3,837.28
  4. Step 4: Simplify right side
    12,721.90x = 73,231,342.23
  5. Step 5: Solve for x
    x = 73,231,342.23/12,721.90
  6. Step 6: Final answer
    x = 5,756.32

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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.