Home / 21,052.72-29,040.15-15,380.54

Finding the Fourth Proportional to 21,052.72, 29,040.15 and 15,380.54

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Solution

The fourth proportional to 21,052.72, 29,040.15 and 15,380.54 is: 21,215.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,052.72 : 29,040.15 = 15,380.54 : x
  2. Step 2: Convert to fraction form
    21,052.72/29,040.15 = 15,380.54/x
  3. Step 3: Cross multiply
    21,052.72x = 29,040.15 × 15,380.54
  4. Step 4: Simplify right side
    21,052.72x = 446,653,188.68
  5. Step 5: Solve for x
    x = 446,653,188.68/21,052.72
  6. Step 6: Final answer
    x = 21,215.94

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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.