Home / 28,968.88-39,977.05-15,720.88

Finding the Fourth Proportional to 28,968.88, 39,977.05 and 15,720.88

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Solution

The fourth proportional to 28,968.88, 39,977.05 and 15,720.88 is: 21,694.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,968.88 : 39,977.05 = 15,720.88 : x
  2. Step 2: Convert to fraction form
    28,968.88/39,977.05 = 15,720.88/x
  3. Step 3: Cross multiply
    28,968.88x = 39,977.05 × 15,720.88
  4. Step 4: Simplify right side
    28,968.88x = 628,474,166.62
  5. Step 5: Solve for x
    x = 628,474,166.62/28,968.88
  6. Step 6: Final answer
    x = 21,694.81

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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.