Home / 28,665.97-39,558.31-15,918.86

Finding the Fourth Proportional to 28,665.97, 39,558.31 and 15,918.86

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Solution

The fourth proportional to 28,665.97, 39,558.31 and 15,918.86 is: 21,967.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,665.97 : 39,558.31 = 15,918.86 : x
  2. Step 2: Convert to fraction form
    28,665.97/39,558.31 = 15,918.86/x
  3. Step 3: Cross multiply
    28,665.97x = 39,558.31 × 15,918.86
  4. Step 4: Simplify right side
    28,665.97x = 629,723,257.83
  5. Step 5: Solve for x
    x = 629,723,257.83/28,665.97
  6. Step 6: Final answer
    x = 21,967.63

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1.5x scale

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.