Home / 28,309.89-39,067.65-15,734.64

Finding the Fourth Proportional to 28,309.89, 39,067.65 and 15,734.64

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Solution

The fourth proportional to 28,309.89, 39,067.65 and 15,734.64 is: 21,713.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,309.89 : 39,067.65 = 15,734.64 : x
  2. Step 2: Convert to fraction form
    28,309.89/39,067.65 = 15,734.64/x
  3. Step 3: Cross multiply
    28,309.89x = 39,067.65 × 15,734.64
  4. Step 4: Simplify right side
    28,309.89x = 614,715,408.40
  5. Step 5: Solve for x
    x = 614,715,408.40/28,309.89
  6. Step 6: Final answer
    x = 21,713.80

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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.