Home / 28,968.66-39,976.75-15,720.66

Finding the Fourth Proportional to 28,968.66, 39,976.75 and 15,720.66

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Solution

The fourth proportional to 28,968.66, 39,976.75 and 15,720.66 is: 21,694.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,968.66 : 39,976.75 = 15,720.66 : x
  2. Step 2: Convert to fraction form
    28,968.66/39,976.75 = 15,720.66/x
  3. Step 3: Cross multiply
    28,968.66x = 39,976.75 × 15,720.66
  4. Step 4: Simplify right side
    28,968.66x = 628,460,675.96
  5. Step 5: Solve for x
    x = 628,460,675.96/28,968.66
  6. Step 6: Final answer
    x = 21,694.51

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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.