Home / 21,149.34-29,145.84-15,485.82

Finding the Fourth Proportional to 21,149.34, 29,145.84 and 15,485.82

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Solution

The fourth proportional to 21,149.34, 29,145.84 and 15,485.82 is: 21,340.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,149.34 : 29,145.84 = 15,485.82 : x
  2. Step 2: Convert to fraction form
    21,149.34/29,145.84 = 15,485.82/x
  3. Step 3: Cross multiply
    21,149.34x = 29,145.84 × 15,485.82
  4. Step 4: Simplify right side
    21,149.34x = 451,347,231.99
  5. Step 5: Solve for x
    x = 451,347,231.99/21,149.34
  6. Step 6: Final answer
    x = 21,340.96

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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.