Home / 28,486.49-39,310.29-15,739.43

Finding the Fourth Proportional to 28,486.49, 39,310.29 and 15,739.43

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Solution

The fourth proportional to 28,486.49, 39,310.29 and 15,739.43 is: 21,719.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,486.49 : 39,310.29 = 15,739.43 : x
  2. Step 2: Convert to fraction form
    28,486.49/39,310.29 = 15,739.43/x
  3. Step 3: Cross multiply
    28,486.49x = 39,310.29 × 15,739.43
  4. Step 4: Simplify right side
    28,486.49x = 618,721,361.18
  5. Step 5: Solve for x
    x = 618,721,361.18/28,486.49
  6. Step 6: Final answer
    x = 21,719.82

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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.