Home / 21,670.44-29,907.32-13,171.81

Finding the Fourth Proportional to 21,670.44, 29,907.32 and 13,171.81

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Solution

The fourth proportional to 21,670.44, 29,907.32 and 13,171.81 is: 18,178.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,670.44 : 29,907.32 = 13,171.81 : x
  2. Step 2: Convert to fraction form
    21,670.44/29,907.32 = 13,171.81/x
  3. Step 3: Cross multiply
    21,670.44x = 29,907.32 × 13,171.81
  4. Step 4: Simplify right side
    21,670.44x = 393,933,536.65
  5. Step 5: Solve for x
    x = 393,933,536.65/21,670.44
  6. Step 6: Final answer
    x = 18,178.38

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.