Home / 28,403.94-39,197.40-15,828.72

Finding the Fourth Proportional to 28,403.94, 39,197.40 and 15,828.72

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Solution

The fourth proportional to 28,403.94, 39,197.40 and 15,828.72 is: 21,843.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,403.94 : 39,197.40 = 15,828.72 : x
  2. Step 2: Convert to fraction form
    28,403.94/39,197.40 = 15,828.72/x
  3. Step 3: Cross multiply
    28,403.94x = 39,197.40 × 15,828.72
  4. Step 4: Simplify right side
    28,403.94x = 620,444,669.33
  5. Step 5: Solve for x
    x = 620,444,669.33/28,403.94
  6. Step 6: Final answer
    x = 21,843.61

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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.